Answer:
See below
Explanation:
13. The molar mass of Cl2 is 70.9 grams/mole. Mass of 0.560 moles:
(0.560 moles)*(70.9 grams/mole) = 39.7 grams Cl2
14. 2 moles of M93N2 has 2*2 = 4 moles of N atoms
15. 2.00 moles Mg3N2 has 2*2 = 4 moles N atoms
16. 9.0 grams of Ag. The molar mass of silver is 107.9 g/mole. 9.0 grams means that there is (9.0g/(107.9 g/mole) = 0.0834 moles Ag.
(0.0834 moles Ag)*(6.022x10^23 Ag atoms/mole) = 5.02x10^22 atoms of silver
The mass of 0.560 moles of chlorine gas is 39.7 g. There are 6.00 moles of Mg atoms and 4.00 moles of N atoms respectively in 2.00 moles of Mg3N2 compound. The number of atoms in 9.0 g of silver can be calculated by converting the grams to moles then multiplying by Avogadro's number.
Explanation:
The mass of chlorine gas can be calculated by multiplying the given moles with the molar mass of chlorine. The molar mass of chlorine (Cl2) is approximately 70.9 g/mol. Therefore, the mass of 0.560 moles of chlorine gas would be 0.560 * 70.9 = 39.7 g.
For Mg3N2, there are 3 moles of Mg per mole of Mg3N2, so there are 2.00 * 3= 6.00 moles of Mg atoms in 2.00 moles of Mg3N2. Similarly, there are 2 moles of N per mole of Mg3N2 so, there are 2*2.00 = 4.00 moles of N atoms in 2.00 moles of Mg3N2.
The number of atoms in silver can be calculated using Avogadro's number, which is 6.02 x 10^23 atoms per mole. First convert the mass to moles (silver has a molar mass of approximately 107.87 g/mol) and then multiply by Avogadro's number.
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the following alkyl halide can be prepared by hbr addition to two different alkenes that are constitutional isomers. draw the structures of both.
An addition reaction occurs when HBr is added to alkenes. Always, the more substituted carbon of the alkene receives the bromine (Markovnikov-selectivity)
An ethene-like compound known as a symmetrical alkene has the same groups at both ends of the carbon-carbon double bond. In the presence of organic peroxides or some airborne oxygen, the reaction takes place at ambient temperature. The two scenarios are identical because alkenes produce residues of organic peroxides when they react extremely slowly with oxygen.
Propene is an example of an unsymmetrical alkene because it has distinct groups at either end of the carbon-carbon double bond. The same conditions as with a symmetrical alkene apply for the reaction, but there is a challenge because the hydrogen and bromine can combine in two different ways.
Normally, the hydrogen becomes linked to the carbon with the most hydrogens when a molecule HX adds to a carbon-carbon double bond. The Markovnikov's Rule is what governs this. The peroxide effect or anti-Markovnikov addition occurs when HBr adds on the "wrong way around" in the presence of organic peroxides.
Hydrogen bromide adds to propene using an electrophilic addition process in the absence of peroxides. This results in the outcome that Markovnikov's Rule expected.
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5.0 mol Al produces up to 2.5 mol
Al2O3 and 6.0 mol O2 produces up to
4.0 mol Al2O3.
Al2O3 102 g/mol
What mass of Al2O3 forms?
[?] g Al₂O3
Give your answer to the ones place.
Mass Al₂O₂(g)
2
3
Enter
5.0 mol Al produces up to 2.5 mol Al2O3 and 6.0 mol O2 produces up to 4.0 mol Al2O3. The mass of Al2O3 forms 47.2 g.
What is mass ?A body's mass is an inherent quality. Prior to the discovery of the atom and particle physics, it was widely considered to be tied to the amount of matter in a physical body.
The amount of matter in a particle or object is represented by the dimensionless quantity mass (symbolized m). The kilogramme is the International System's (SI) preferred unit of mass (kg).
Atomic mass of Al - 27, O - 16
Al₂O₃ molecular mass
= 2 * 27 + 3 * 16
= 102
54 g Al ⇾ 102 g Al₂O₃
25g Al ⇾ x g Al₂O₃
x = 25 * 102 / 54
= 47.2 g Al₂O₃
Thus, The mass of Al2O3 forms 47.2 g.
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Answer:
255
Explanation:
Since the amount of Al that can react is limiting, the theoretical yield of Al2O3 will be based on the amount of Al available.
From the balanced equation, we can see that 4 mol Al produces 2 mol Al2O3:
4 Al + 3 O2 → 2 Al2O3
So, 5.0 mol Al will produce:
2.5 mol Al2O3 = 2 mol Al2O3/4 mol Al * 5.0 mol Al = 2.5 mol Al2O3
The molar mass of Al2O3 is 102 g/mol, so:
mass of Al2O3 = 2.5 mol Al2O3 * 102 g/mol = 255 g
Therefore, the mass of Al2O3 that forms is 255 g, rounded to the nearest ones place.
Please answer I need to finish this early
The layers of the earth as shown in the diagram are:
the first layer is the lithospherethe second layer is the asthenosphere.What are the layers of the earth?The Earth is composed of four distinct layers:
the inner core,the outer core,the mantle, andthe crust.The Earth's outermost layers, the crust and the brittle upper part of the mantle, are together referred to as the lithosphere. The asthenosphere, another component of the upper mantle, and the atmosphere form its boundaries.
Located under the lithosphere, the asthenosphere is a region of the Earth's mantle that is thought to be significantly hotter and more fluid than the lithosphere. Between 100 km (60 miles) and 700 km (450 miles) below the surface of the Earth is the asthenosphere.
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when the equation, ___n2 + ___h2 → ___nh3 is balanced, the coefficient of hydrogen is:
The equation can be balanced as N2+3H2→2NH3. The coefficients of Hydrogen (1) is 3 and NH3 is 2.
In the equation, N2+3H2→2NH3, the reactants are Nitrogen and Hydrogen which combine to form the product Ammonia. In this balanced equation, hydrogens has a coefficient of 2 in front of ammonia and a coefficient of 3 in front of the hydrogen. There are various ways to detect the presence of the product which is ammonia gas. Ammonia gas detectors are also present at various areas to detect the ammonia gas. Ammonia gas can also be detected by nose if the concentration is more than 5 ppm.
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What are the predicted products for the Sn1 reaction shown? nie NaSH HS ire
Nucleophilic substitution is indicated by the letter "S," while a single molecular rate-determining step is indicated by the number "1."
As a result, it is common to depict the rate equation as depending first-order on the substrate and zero-order on the nucleophile. This correlation exists when the nucleophile concentration is substantially higher than the intermediates. Instead, steady-state kinetics may provide a more realistic description of the rate equation. Reactions of secondary or tertiary alkyl halides under extremely basic conditions or, under strongly acidic conditions, with secondary or tertiary alcohols are prominent examples of this process, which involves a carbocation intermediate.
In contrast, the SN2 alternative reaction takes place with primary and secondary alkyl halides. The SN1 reaction is also known as the dissociative substitution in inorganic chemistry.
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Th-231 undergoes beta decay.What is the final product
The final product of the beta decay of Thorium Th-231 is ²³¹Pa₉₁.
What is beta decay?Beta decay can be explained as a kind of radioactive decay in which a beta particle is released from an atomic nucleus and is changing the real nuclide to an isobar.
Beta decay will transform it into a proton by the emission of an electron as well antineutrino. A proton is changed into a neutron by the liberating of a positron with a neutrino.
Neither the β-particle nor its anti-neutrino exist within the nucleus before β-decay but can be generated in the decay process.
The probability of decaying because of beta and other decay is estimated by its nuclear binding energy.
²³¹Pa₉₀ ²³¹Pa₉₁ + ⁰e₋₁
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how many grams of nacl, m.w. 58.5 daltons, are necessary to make 1 liter of 5% saline?
50 grams of NaCl, m.w. 58.5 daltons are required to make 1 liter of 5% saline.
Saline water (generally known as salt water) is water that contains a high concentration of dissolved salts or NaCl. The saline is used in the management and treatment of dehydration, e.g., hypovolemia, shock), metabolic alkalosis in the presence of fluid loss, and mild sodium depletion.
Therefore it is stated that saline is the solution which is composed of salt and water. And in order to make 1 liter of 5% saline, 50 grams of sodium chloride or NaCl is required.
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1. Review the terms and their definitions in the Mini Glossary. Explain the principle of superposition
in your own words.
According to superposition principle of rocks the oldest sedimentary rock layer is in the bottom and the youngest will be the upper layer.
What is superposition principle?One of the geological laws that geologists use to calculate the relative ages of rock strata, or layers, is the law of superposition. According to this theory, rock layers are stacked or deposited one on top of the other. The bottom will have the oldest rock strata and the top will have the youngest.
Earlier rocks, which were horizontally deposited over the older layers, are buried deeper in the planet than younger ones. This now widely accepted idea, which is also known as the Law of Superposition, is regarded as a fundamental rule of geology.
Long before the technology existed to compute the precise ages of rocks, geologists were able to use this principle to identify the oldest rock layers.
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Which of the following is not a ligand to the porphyrin ring Fe(II) ion in oxymyoglobin? A) distal his B) proximal his C) Nitrogen atoms in the porphyrin (tetrapyrole) ring D) Oxygen E) all are ligands
A ligand is an atom or molecule that binds to a central atom or ion. The porphyrin ring Fe(II) ion in oxymyoglobin is coordinated by four nitrogen atoms from the porphyrin ring,
two oxygen atoms, and two histidine residues (distal and proximal). Therefore, all of the listed options are ligands.
In oxymyoglobin, the four nitrogen atoms of the porphyrin ring (tetrapyrole) are coordinated to the Fe(II) ion. These nitrogen atoms can be considered as donor atoms, donating electrons to the metal ion. The two oxygen atoms of the heme group and the two histidine residues (distal and proximal) are also donating electrons and thus considered as ligands. All of these atoms and molecules are involved in the coordination of the Fe(II) ion in oxymyoglobin and can be considered as ligands.
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Identify the correct statement or statements about entropy:
1- Entropy is a state function-the current value doesn't depend on the previous history.
2- Entropy is a measure of the randomness or disorder of the system.
3- The standard Entropy of a pure substance (like oxygen gas) is zero at 273K.
4- Any spontaneous process increases the total entropy of the entire universe.
5- The product of a chemical reaction must have ahigher entropy than the reactants.
6- Entropy increases when a solid turns into a gas.
Options 1,2,4,and 6 are correct because of multiple factors that effect entropy of a reaction in various conditions.
1- Entropy is a state function-the current value doesn't depend on the reaction previous history.
2- Entropy is a measure of the randomness or disorder of the system.
4- Any spontaneous process increases the total entropy of the entire universe.
6- Entropy increases when a solid turns into a gas. The statement 3 is not correct, the standard entropy of a pure substance at a given temperature is not always zero. And statement 5 is not correct since the product of a chemical reaction doesn't have to have a higher entropy than the reactants, it depends on the specific reaction.
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REPORT SHEET Conversion Factors and Problem Solving A. Rounding Off Initial Number 143.63212 532 800 0.008 583 45 Student's 1. Correet? 2. Corrected (if needed Rounded Value (yes/no) 144 533 0.009 8.00 B. Significant Figures in Calculations B.1 Multiplication and Division Perform the following multiplication and division calculations. Give a final answer with the correct number of significant figures: 0.1 1 84 × 8.00 × 0.0345 (42.4)(15.6) 1.265 (35.56)(1.45) (4.8X0.56) B.2 Addition and Subtraction Perform the following addition and subtraction calculations. Give a final answer with the correct number of decimal places 13.45 mL+0.4552 mL 145.5 m +86.58 m+1045 m 245.625 g-80.2 g 4.62cm-0.885 cm Conversion Factors and Problem Solving 3 Area 1. Your measurements 3. Another student's measurements Length Width Area (2., 4.) Why could two students obtain different values for the calculated area of the same rectangle? B.4 Volume of a Solid 1. Shape of the solid Dimensions to measure Length Diameter (if cylinder) 2. Height Width 3. Formula for volume of solid Volume of the solid Show calculations of volume, including the units.)
Two students could obtain different values for the calculated area of the same rectangle due to rounding and the accuracy of their measurements.
Why could two students obtain different values for the calculated area of the same rectangle?For instance, if a student rounded down the length of the rectangle and another student rounded up, the area would be different.Additionally, if the measurements taken by each student were off by even a small margin, this could create a difference in the calculated area.For example, a length of 10 cm and a width of 5 cm would result in an area of 50 cm2, but a length of 10.1 cm and a width of 5 cm would result in an area of 50.5 cm2.To calculate the volume of a solid, the formula used depends on the shape of the solid.For a cube, the volume is calculated by multiplying the length by the width by the height. For a cylinder, the volume can be calculated by multiplying the diameter by the diameter by the height, and then multiplying that value by pi.For a rectangular prism, the volume is calculated by multiplying the length by the width by the height.For example, a cube with a length, width, and height of 10 cm would have a volume of 1000 cm3 (10x10x10=1000).A cylinder with a diameter of 10 cm and a height of 15 cm would have a volume of 707.1 cm3 (πx10x10x15= 707.1).Finally, a rectangular prism with a length of 10 cm, a width of 5 cm, and a height of 15 cm would have a volume of 750 cm3 (10x5x15=750).To learn more about Conversion factors refer to:
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the binding agent that powdered pigment is mixed with to form paint is known as the __________.
The binding agent that powdered pigment is mixed with to form paint is known as the binder or vehicle.
A binder, also known as a vehicle or medium, is a substance that is added to powdered pigments to form paint. The binder serves as the adhesive that holds the pigments together and attaches them to a surface. Without a binder, the pigments would simply be a dry powder that would not stick to a surface or retain its color over time. Binders can be made from a variety of materials, including natural and synthetic substances. Some common types of binders used in paint include:Oil-based binders, such as linseed oil, which are derived from plants and animals. Synthetic binders, such as acrylics, alkyds, and polyurethanes, which are made from chemicals. Water-based binders, such as gum arabic, which are water-soluble and can be thinned with water.
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An unknown substance was put in a container. The substance filled up the container from bottom up, taking half of the space in the container. What is most likely the state of matter of the substance
The state of matter of the aforementioned substance that most closely resembles liquid is determined by the forces of attraction.
What characteristic indicates a substance's state at room temperature—solid or liquid?The mass of a substance is determined by its temperature. Whether a substance is a gas, solid, or liquid depends on its temperature. The direction of a gas's molecules and atoms' motion depends on temperature.
No matter how much of this substance is present in the container, which state of matter fills the entire space?A liquid is an incompressible fluid that maintains a constant volume under all conditions and conforms to the shape of its container. One of the four basic states of matter, it is also the only one to have a set volume but no fixed form.
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A standard hydrogen electrode is immersed in an acetic acid solution. This electrode is connected by an external circuit to an iron nail dipping into 0.10 M FeCl2. If Ecell is found to be 0.24 V, what is the pH of the acetic acid solution
The pH of the acetic acid solution is 7.46.
A standard hydrogen electrode (SHE) is immersed in an acetic acid (CH3COOH) solution, and connected by an external circuit to an iron nail dipping into 0.10 M FeCl2. The measured potential of this cell, Ecell, is 0.24 V. To calculate the pH of the acetic acid solution, we must first understand the reaction taking place in the cell.
The SHE acts as the reducing agent in the cell, and is oxidized according to the following reaction:
SHE + H+ → H2
At the same time, the iron nail is acting as the oxidizing agent, and is reduced according to the following reaction:
Fe2+ + 2e- → Fe
Combining the two reactions, we can construct the overall cell reaction:
CH3COOH + H+ + Fe2+ → CH3COO- + H2 + Fe
Using the Nernst equation, we can calculate the pH of the acetic acid solution:
Ecell = E0cell - (RT/F) * ln( [CH3COO-] * [Fe] / [CH3COOH] * [Fe2+] )
Rearranging the equation:
pH = pK + log[ (Ecell - E0cell) / (RT/F) ] + log([CH3COOH]/[Fe2+])
Using the given values, we can calculate the pH of the acetic acid solution:
pH = 4.76 + log[ (0.24 - 0) / (0.0591) ] + log([1]/[0.10])
= 4.76 + 1.7 + 1
= 7.46
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PLEASE HELP FAST I HAVE POSTED THIS QUESTION 3 TIMES!!
The number of moles of hydrogen in 25 g is 12.5 and number of moles of oxygen gas in 128 g is 4 moles. The limiting reactant in the reaction is oxygen because, it is not sufficient in the reaction.
What is limiting reactant ?The reactant which is fewer in amount will determine the yield of the reaction because as this reactant is consumed, the reaction would stop and no further progress as the excess reactant is there.
This reactant which determine the yield of reaction is called the limiting reactant. In the given reaction 2 moles of hydrogen gas reacts with one mole of oxygen gas.
molecular mass of H₂ = 2 g/mol
molecular mass of O₂ = 32 g/mol
moles of H₂ in 25 g = 25 /2 = 12.5 moles
moles of O₂ in 128 g = 128 /32 = 4 moles.
12.5 moles of H₂ gas needs 6.2 moles of oxygen gas but, we have only 4 moles. Therefore, oxygen is the limiting reactant.
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75g of a potato chip are burned in a calorimeter that contains 2L of water initially at 297K. After the combustion, the temperature rises 12oC. How much heat if involved per gram of potato chip burned
q = mCT, q = heat =?, m = mass of water (not of the chips) = 58.18 g, C = specific heat of water = 4.184 J/g-deg, T = change in temperature = 28.1 - 21.5 = 6.6 deg, and q = (58.18 g)(4.284 J/g-deg)(6.6 deg).
How does calorimetry work to determine the heat of combustion?Equation q = -CT, where C is the calorimeter's heat capacity and T is the temperature change, can be used to determine how much heat is released during the reaction. Since the combustion takes place at a constant volume, the reaction's q is equal to E.
How can you figure out a calorimeter's heat flow?q = MSP heat, where q = heat quantity, expressed in joules (J). 1 degree C Mass, expressed in grams, is K. m. t = °C or K of temperature change. The amount of heat needed to increase the temperature of a specified quantity of a substance by one degree is known as the heat capacity, or C, of the substance.
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The probability that it is friday and your day off is 12%. What is the probability that it is your day off given that today is friday?.
The probability that it is your day off given that today is friday 12% or 0.12. Conditional probability is the probability of an event occurring given that another event has already occurred.
We can use Bayes' Theorem, which states that:
P(A | B) = P(B | A) * P(A) / P(B)
Where:
P(A) is the probability of event A happening (it is your day off)
P(B) is the probability of event B happening (today is Friday)
P(A | B) is the probability of event A happening, given that event B has happened (the probability that it is your day off, given that today is Friday)
P(B | A) is the probability of event B happening, given that event A has happened (the probability that it is Friday, given that it is your day off)
We know that the probability of it being Friday and your day off is 12%. This is the joint probability of events A and B.
P(A and B) = P(A) * P(B) = 0.12
We are also given that the probability that it is Friday and it's your day off is 12% which is equivalent to P(A and B)
We don't have the information about the probability of B given A, but we have P(A and B) and we know the probability of B and A.
so we can calculate P(A|B) as follows:
P(A|B) = P(A and B) / P(B) = (0.12) / (0.12 + x)
Where x is the probability of B given A is not true.
This formula tells us that the probability that it is your day off, given that today is Friday, is 12% or 0.12
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Given that it is Friday today, the likelihood that it is your day off is 12%, or 0.12. The likelihood of an event happening given that another event has already happened is known as conditional probability.
Using the Bayes' Theorem, which says:
P(B | A) * P(A) / P(A | B) = P(B | A) (B)
Where:
The probability of an event is P(A). an occurrence (it is your day off). P(B) is the likelihood that event B will occur (today is Friday)
P(A | B) represents the likelihood that event A will occur given that event B has already occurred (the probability that it is your day off, given that today is Friday). P(B | A) is the likelihood that event B will occur assuming that event A has already occurred (the likelihood that it will be Friday).
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Identify the step that is not recommended when responding to an emergency. Select one: O Proceed calmly and listen for instructions. O Gather your belongings. O Alert your instructor O Turn off equipment such as Bunsen burners and gas jets.
The chemistry lab emergency procedure that is not advised is (b) gathering your belongings. It will only make things worse in that circumstance.
It is advised that you remain composed, inform the lab instructor, pay attention to their directions, and close any equipment that might later cause a problem, such as gas jets, burners, or other ignition sources.
By taking the necessary safeguards to lessen the effects of hazardous conditions brought on by fire, severe weather, utility failures, or loss of services, laboratory equipment, materials, and research can be preserved against loss during emergencies.
Additional actions that are advised include:
In the event of a serious emergency, notify others and sound the alarm.
In case of harmful spill, leave the building immediately.
Extinguish a tiny fire if it's safe to do so.
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What is a group 1 metal called?
The group 1 metals placed in the periodic table is called as the Alkali metals. because of their oxides and the hydroxide form alkaline solution with water.
The group 1 elements called as the alkali metal as their oxides and their hydroxides form the alkaline solution with the water. The alkali metals are given as :
Hydrogen - HLithium - LiSodium - NaPotassium - KRubidium - RbCesium - CsFrancium - FrThese elements are the metals except the hydrogen . the hydrogen element is the non metal nut place in the group 1. the hydrogen is the exception. the alkali metals are very reactive.
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The periodic table's group 1 metals are referred to as alkali metals. due to the formation of an alkaline solution with water by their oxides and hydroxides.
When combined with water, the group 1 elements known as the alkali metals' oxides and hydroxides create an alkaline solution. The following are the alkali metals:
Hydrogen - H
Rubidium - Rb
Lithium - Li
Sodium - Na
Potassium - K
Francium - Fr
Cesium - Cs
With the exception of hydrogen, these elements are all metals. The non-metal spot in group one is occupied by the hydrogen element. The exception is hydrogen. The reactiveness of alkali metals is high. it is due to only 1 electron in the outer most energy shell which is not under high attraction from the nucleus due to shielding effect of inner electrons.
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what volume of concentrated (14.7 m) phosphoric acid is needed to prepare 25.0 l of 3.0 m h3po4?
We need 1.68 L of concentrated (14.7 M) phosphoric acid to prepare 25.0 L of 3.0 M H3PO4.
To prepare 25.0 L of 3.0 M H3PO4, we can use the formula:
M1V1 = M2V2
Where M1 = concentrated phosphoric acid (14.7 M)
V1 = (the volume of concentrated phosphoric acid needed)
M2 = 3.0 M
V2 => 25.0 L
We can solve for V1 by substituting the values into the formula and rearranging:
V1 = (M2V2) / M1
V1 = (3.0 M * 25.0 L) / 14.7 M
V1 = 1.68 L
So, we need 1.68 L of concentrated (14.7 M) phosphoric acid to prepare 25.0 L of 3.0 M H3PO4.
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A Bronsted-Lowry base is defined as a substance that O increases [H^+] when placed in H_2O O decreases [H^+] when placed in H_2O O increases [OH] when placed in H_2O O acts as a proton acceptor O acts as a proton donor
The definition of a Bronsted-Lowry base is a b) proton (or hydrogen ion) acceptor.
Any species that can donate a proton qualifies as a Bronsted-Lowry acid, and any species that can accept a proton qualifies as a base. A Bronsted-Lowry base must have at least one lone pair of electrons in order to accept a proton and create a new bond with it. When one compound accepts a proton or H+ ion from another, the resulting conjugated acid is known as a Bronsted-Lowry base. While weak acids and bases only partially ionise in an aqueous solution, strong acids and bases do so completely. In response If there are fewer hydrogens, then the substance is acid (donates hydrogen ions). If the quantity of hydrogens increase then the substance is considered as base i.e. it accepts hydrogen ions.
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a typical prokaryotic cell __________________ compared to a eukaryotic cell.
Prokaryotic cells typically have diameters ranging from 0.1 to 5.0 micrometers (m) and are substantially smaller than eukaryotic cells, which typically have diameters ranging from 10 to 100 m.
What is prokaryotic cell?A single-celled creature called a prokaryote lacks a nucleus and other membrane-bound organelles. The term prokaryote is derived from the Greek and v. Prokaryotes were classed into the empire Prokaryota in the two-empire concept developed by Édouard Chatton. A nucleoid area, DNA and RNA as genetic material, ribosomes that create proteins, and cytoplasm that contains a cytoskeleton that organizes cellular components are all present in all prokaryotic cells. Prokaryotic creatures, on the other hand, are a tremendously varied group of organisms that exist in a wide range of forms and sizes.
Here,
Prokaryotic cells typically have diameters ranging from 0.1 to 5.0 micrometers (m), making them substantially smaller than eukaryotic cells, which typically have dimensions ranging from 10 to 100 m.
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Cora conducts flame tests to identify metals in four samples. The results are listed in the table.
Sample 1, flame test color, yellow. Sample 2, flame test color, green. Sample 3, flame test color, red. Sample 4, flame test color orange red.
Why does Cora see different-colored flames? Choose the correct answer.
Responses
The electrons of different elements deflect different amounts of energy.
The electrons of different elements absorb different amounts of energy.
The number of outer shell electrons of an element determines the wavelength of light produced.
The number of outer shell electrons of an element determines the wavelength of light reflected.
The different colors stem from the fact that the electrons of different elements absorb different amounts of energy. Option B
What is the flame test?We know that in chemistry, the flame test is one of the ways that we can be able to find out the kind of element that we have. The process of the test is just that we can be able to moisten a salt of the test substance and then expose it to flame. The color that we see from the flame is the color of the electronic transition that is going on in the atom of the element.
Since we know that what is going on is that basically the electrons that are in the substance would just absorb energy and move from a one energy level to the next and this would lead to the emission of light of a characteristic color, this us what we see in the flame test.
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By titration, 19.5 mL of aqueous H250 neutralized 25.9 mL of 0.0266 M LiOH solution. What was the molarity of the aqueous acid solution?
The molarity of the aqueous acid, H₂SO₄ solution, given that 19.5 mL of the acid is needed to neutralize 25.9 mL of 0.0266 M LiOH solution is 0.0177 M
How do I determine the molarity of the acid?We'll begin by obtaining the mole ratio of the acid and based from the balanced neutralization equation for the reaction. This is given below:
H₂SO₄ + 2LiOH —> Li₂SO₄ + 2H₂O
The mole ratio of the acid, H₂SO₄ (nA) = 1The mole ratio of the base, LiOH (nB) = 2Finally, we shall determine the molarity of the aqueous acid, H₂SO₄ solution. Details below
Volume of acid, H₂SO₄ (Va) = 19.5 mLVolume of base, LiOH (Vb) = 25.9 mLMolarity of base, LiOH (Mb) = 0.609 M Molarity of acid, H₂SO₄ (Ma) =?MaVa / MbVb = nA / nB
(Ma × 19.5) / (0.0266 × 25.9) = 1 / 2
Cross multiply
Ma × 19.5 × 2 = 0.0266 × 25.9
Divide both side by 19.5 × 2
Ma = (0.0266 × 25.9) / (19.5 × 2)
Ma = 0.0177 M
Thus, the molarity of the acid is 0.0177 M
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PLEASE HELP I NEED THIS FAST. ITS DUE TODAY
Research "Scientific Method".
Open/start a document>Give details of your findings from your research.
Find and focus upon a scientific question concerning "chemistry".
Put the question into writing and include it as part of what you turn in.
Determine a hypothesis (if then statement ) write it also.
Put together a way of testing your hypothesis.
To review; Research, Give background, Question, Hypothesize, Devise/outline an Experiment. All about one topic in chemistry. Cite your sources.
Report by end of school Friday.
Answer:
The scientific method is a systematic approach to problem-solving that is used to explore and understand the natural world. It is based on the idea that knowledge is acquired through observation and experimentation, and that new ideas can be tested and refined through the scientific process.
Scientific question: How does the concentration of a solute in a solvent affect the rate of diffusion?
Hypothesis: If the concentration of a solute in a solvent is increased, then the rate of diffusion will also increase.
Experiment:
Obtain a container with a flat bottom and a lid, such as a petri dish or a covered glass dish.
Fill the container with a solvent, such as water.
Add a solute to the solvent, such as salt or sugar. Vary the concentration of the solute by adding different amounts.
Place a drop of food coloring in the center of the solvent.
Close the lid of the container and observe the rate at which the food coloring spreads outwards.
Repeat the experiment with different concentrations of the solute to compare the results.
Citation:
"Scientific Method." Encyclopedia Britannica, Encyclopedia Britannica, Inc., www.britannica.com/topic/scientific-method.
Explanation:
If a piece of jewelry were electroplated with gold for 25 seconds at 1. 5 a, how many grams of gold would be plated?.
The gold that would be plated from jewelry that is electroplated with gold for 25 seconds at 1.5A is 0.07 grams.
How many grams of gold would be plated?The gold that would be plated can be calculated according to the electrochemical equation which is AU ++ 1e-Au(s).
Now, electrochemical reaction will result the plating of 1 atom of gold for 1 electron. So for 25 seconds at 1.5 A, we get 1.5*25 = 37.5 coulombs of electrons since the ampere is equal to coulomb per second.
The number of electrons we have if coulomb of electrons about 6.241Ă*10^18 electrons is 6.241Ă*10^18*37.5 = 2.34*10^20. Then we can calculate the moles using Avogadro's number which is 2.34*10^20 / 6.02*10^23 = 3.88*10^-4.
Then, we can calculate the grams of gold by multiplying the number of moles by the weight of the atom gold. So, 3.88*10^-4 * 196.96657 = 7.65*10^-2.
Thus the number of gold that would be plated in grams is 7.65*10^2 or equal to 0.077 grams.
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A mixture of gases at 4.45 atm consists of 14.6 moles of hydrogen gas and 16.9 moles of helium gas. Determine the partial pressure of the helium gas.
the answer to your chemistry high school question is... the partial pressure is 11.7 moles
how many grams is hydrogen gas (H2) are in 2600 ml comtainer at 35 degrees celsius and a pressure of 165 mmHg
the answer is b
Explanation: its b
The formula of antimony (V) phosphide is:
O Sb5P3
O Sb3P5
O None of these
O SbP5
O Sb2P5
O Sb5P2
O SbP
O SbP3
The correct formula for antimony (V) phosphide is SbP5. This formula reflects the fact that there is one antimony atom and five phosphorus atoms in the compound, with the antimony having an oxidation state of +5.
Chemical nomenclature is the practice of assigning names to chemical compounds. This is done using the rules of IUPAC nomenclature, which involves using prefixes, suffixes, and numerical prefixes to indicate the structure of the compound. For example, the chemical name for water is dihydrogen monoxide, which indicates that it contains two hydrogen atoms and one oxygen atom.
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2 g of hydrogen reacts with oxygen to form 18 g of water. What mass of water
will be formed from 1 g of hydrogen?
Answer:
must be 9 g of water.
Explanation:
i did 18/2.
