Electronegativity differences between two elements shows whether the element will bond together with an ionic bond, a polar bond or a non polar bond.
The term Electronegativity is a measure of the tendency of an atom to attract electrons towards itself. It determines the shared electrons are distributed between the two atoms. The differences in electronegativity shows whether a bond is nonpolar or polar. The electronegativity increases from left to right across a period in the periodic table. It decreases down a group. All Metals tend to be less electronegative elements. It helps to identify the bonds between the atoms in a molecule. It shows how the shared electrons are distributed between the two atoms in a bond.
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6. One of the examples of homologous series is given below. H H₂OH X i. ii. H₂CH₂CH₂OH Define homologous series. [1] Find the mass difference between successive member of above homologous series and calculate the molecular mass of X [2] iii.why do you think in some cases first member of the homologus series is unique than root of the member
A homologous series is a group of substances that share the same general formula but differ only in the length of the carbon chain.
With an example, what is homologous series?A homologous series is a collection of chemical substances that share a functional group. The compounds display comparable chemical characteristics as a result of sharing an active group. Alkanes, cycloalkanes, and alkenes are prominent examples of homologous series.
An example of a functional group.A set of molecules' atoms known as a functional group in organic chemistry binds collectively to cause predictable reactions. The groups hydroxyl, ketone, amine, and ether are some of the examples of functional groups.
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Write balanced net ionic equation for the following reaction: Fe(OH)3(s) + H2SO4(aq) +? Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣΦ х" Хь al RI - 11 2Fe(OH)2 (s) + 6H+ (aq) +350? (aq) →Fe (SO.)(s) + 6H2O(1) O Check your placement of subscripts and superscripts. You can also review how to insert subscripts and more No credit lost. Try again.
A chemical reactions is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides.
The correct formula is: Fe2(SO4)3(s) + 6H2O = 2Fe+3(aq) + 6OH-(s) + 6H+(aq) + 3SO4-2(aq) (l).
An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same total charge and the same number of atoms for each component in the reaction. In other words, both sides of the reaction have equal amounts of mass and charge.
According to the law, mass cannot be created or destroyed during a chemical reaction.
Chemical reactions need to be properly balanced because of this.
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What are the major disadvantages of using ozone instead of chlorine to disinfect water? O Ozonation is more expensive than chlorination and ozone leaves an odor in the water O Ozonation causes trihalomethane formation and leaves an odor in the treated water O Ozone decomposes quickly and does not provide long-term protection against possible contamination as the water is piped through a municipal distribution system O Ozonation causes trihalomethane formation and is more expensive than chlorination
The major disadvantage is - Ozone decomposes quickly and does not provide long-term protection against possible contamination as the water is piped through a municipal distribution system.
The gas ozone (O3) is unstable. As a result, it breaks down quickly, oxidizing any organic impurities present in the water including bacteria, viruses, and germs, but because it is a gas, it leaves the water after the oxidation is complete. Therefore, when the ozone started to disintegrate at first, the water may have various additional contaminants that mix with it as it travels through the municipal distribution system. Water carries through the new pollutants from the pipes. Ozone therefore has no long-term effect.
Chlorination produces trihalomethane, not ozonation, hence the expansiveness of ozone is dependent on the impurity of the water. Trihalomethane is produced by chlorination, not ozonation. Although ozone as a gas has a faint odor, when it is combined with water, it oxidizes the pollutant and breaks down, leaving no ozone in the water. Therefore, water does not smell like ozone.
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Under the right conditions, sometimes atoms and molecules (reactants) will come together to form new
molecules (products)? When this happens, is matter being created?
Answer:
Matter is made up of extremely tiny particles called atoms and molecules .So i think when joined matter is formed
sulfuric acid (aq) + zinc hydroxide (s) zinc sulfate (aq) + water (l)
Sulfuric acid (aq) + zinc hydroxide (s) ---> zinc sulfate (aq) + water (l) :
H₂SO₄(aq) + Zn(OH)₂(s) ----> ZnSO₄(aq) + 2H₂O(l). This is a type of neutralization reaction.
The reaction is given as :
H₂SO₄(aq) + Zn(OH)₂(s) ----> ZnSO₄(aq) + 2H₂O(l).
Sulfuric acid zinc hydroxide zinc sulfate water
This is reaction it the type of the neutralization reaction. The neutralization reaction is the reaction in which the acid base will react and produces the salt and the water. In this type of the reaction the H⁺ ions and OH⁻ ions forms the water. This is also called as the acid - base neutralization reaction.
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A) (NH4)3PO4(aq)+CaCl2(aq)→Ca3(PO4)2(s)+NH4Cl(aq)
Express your answer as a chemical equation. Identify all of the phases in your answer.
B) HCl(g)+O2(g)→H2O(g)+Cl2(g)
Express your answer as a chemical equation. Identify all of the phases in your answer.
A) (NH4)3PO4(aq)+CaCl2(aq)→Ca3(PO4)2(s)+NH4Cl(aq)
Step 1: Find the number of atoms
On reactant side: On product side:
N – 3 N - 1
H – 12 H - 4
P -1 P - 2
O – 4 O - 8
Ca – 1 Ca - 3
Cl – 2 Cl - 1
Step 2: Balance the equation by adding coefficient
Coefficient 3 added on reactant side to balance Ca
(NH4)3PO4(aq)+3CaCl2(aq)→Ca3(PO4)2(s)+NH4Cl(aq)
On reactant side: On product side:
N – 3 N – 1
H – 12 H – 4
P -1 P - 2
O – 4 O - 8
Ca – 1x3=3 Ca - 3
Cl – 2x3=6 Cl – 1
Add 6 on product side to balance Cl
(NH4)3PO4(aq)+3CaCl2(aq)→Ca3(PO4)2(s)+6NH4Cl(aq)
On reactant side: On product side:
N – 3 N – 1x6=6
H – 12 H – 4x6=24
P -1 P - 2
O – 4 O - 8
Ca – 1x3=3 Ca - 3
Cl – 2x3=6 Cl – 1x6=6
Add 2 on reactant side to balance N
2(NH4)3PO4(aq)+3CaCl2(aq)→Ca3(PO4)2(s)+6NH4Cl(aq)
On reactant side: On product side:
N – 3x2=6 N – 1x6=6
H – 12x2=24 H – 4x6=24
P -1x2=2 P - 2
O – 4x2=8 O - 8
Ca – 1x3=3 Ca - 3
Cl – 2x3=6 Cl – 1x6=6
Now all the atoms are balanced on both sides therefore, the balanced chemical reaction is
2(NH4)3PO4(aq) + 3CaCl2(aq) → Ca3(PO4)2(s) + 6NH4Cl(aq)
B) HCl(g)+O2(g)→H2O(g)+Cl2(g)
Step 1: Find the number of atoms
On reactant side: On product side:
H – 1 H - 2
Cl – 1 Cl – 2
O – 2 O – 1
Step 2: Balance the equation by adding coefficient
Add 2 on product side to balance O
HCl+O2→2H2O+Cl2
On reactant side: On product side:
H – 1 H – 2x2=4
Cl – 1 Cl – 2
O – 2 O – 1x2=2
Add 4 on reactant side to balance H
4HCl+O2→2H2O+Cl2
On reactant side: On product side:
H – 1x4=4 H – 2x2=4
Cl – 1x4=4 Cl – 2
O – 2 O – 1x2=2
Add 2 on product side to balance Cl
4HCl+O2→2H2O+2Cl2
On reactant side: On product side:
H – 1x4=4 H – 2x2=4
Cl – 1x4=4 Cl – 2x2=4
O – 2 O – 1x2=2
Now all the atoms are balanced on both sides therefore, the balanced chemical reaction is 4HCl+O2→2H2O+2Cl2
HCl will be in aqueous state, O2 and Cl2 in gaseous state, H2O in liquid state
4HCl(aq) + O2(g) → 2H2O(l) + 2Cl2(g)
"aq" denotes an aqueous solution, "s" denotes a solid, "g" denotes a gas and "l" denotes a liquid.
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compared to an uncatalyzed reaction, an enzyme-catalyzed reaction ________.
An enzyme-catalyzed reaction proceeds more quickly than an uncatalyzed reaction.
Usually, catalyzed reactions are employed to quicken the rate at which a certain chemistry develops. The catalyst's main function is to give the reaction a another, lower-energy pathway. The catalyst reacts with a reactant to create an intermediate product, which causes this to happen. Enzymes lower the activation energy of catalyzed reactions, whereas uncatalyzed reactions are typically spontaneous in nature. The reaction happens more quickly. In a catalyzed reaction, particularly the same catalyzed reaction, this is true. The reaction rate of a catalyzed reaction is, nonetheless, quicker than the reaction rate of the uncatalyzed reaction at the same temperature due to its lower Ea.
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You now need to make 150 mL of a 1 mg/mL hemoglobin solution. How many mg will you need?
Your scale measures mass in grams. How many grams of hemoglobin will you need to make the above solution?
150mg, which is equivalent to 0.15g, will be needed to make 150mL of the hemoglobin solution.
How to convert units of mass?Mass is a quantity of matter which a body contains, irrespective of its bulk or volume. It is one of four fundamental properties of matter. It is measured in kilograms in the SI system of measurement or grams, milligrams etc.
According to this question, one needs to make 150 mL of a 1 mg/mL hemoglobin solution. This means that;
1mg = 1mL
Hence, 150mL will need 150mg
Since 1mg = 0.001g
150mg = 150 × 10-³ = 0.15grams.
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A runner reaches a speed of of 3m/a after accelerating at 2.25m/s2 whilst travelling a distance of 2m what is the initial speed
The initial speed of the runner would be 0 m/s.
Speed determinationThe initial speed of the runner according to the illustration can be determined using one of the equations of motion.
Final speed (v) = 3 m/s
Acceleration (a) = 2.25 m/s2
Distance covered (s) = 2 m
Initial speed (u) = ?
Using the equation: [tex]v^2 = u^2 + 2as[/tex]
Thus: 3^2 = u^2 + 2x2.25x2
9 = u^2 + 9
u^2 = 9 - 9
u = 0 m/s
In other words, the initial speed of the runner is 0 m/s. The runner started from zero and accelerated to as speed of 3 m/s.
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which bond is the longest (has the most distance between the atoms)? explain the reason for this in terms of atomic structure.
The distance between covalent bonds is largest between C and C. C has the largest covalent radius when contrasted to N, O, and H. The length of a non-polar relationship is larger than a polar bond.
What renders it covalent?Covalent bonds were first identified in 1939. The word "covalent bond" is derived from the prefix co-, which indicates jointly, connected in action, associated to a lesser extent, etc. The h+ ions share the two electrons through covalent bonding since the prefix co- implies cooperatively, associated in action, etc.
What other name exist for covalent?Molecular bonds are yet another name for covalent bonds. The atoms' outer shell will remain strong thanks to the sharing of bonding pairs.
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Write the IUPAC name for the following compound CH_3 - CH_2 - CH_2 - NH_2 Write the IUPAC name for the following compound
The IUPAC name CH₃-CH₂-CH₂-NH₂ is propan-1-amine.
IUPAC is an international body that accommodates and represents researchers in chemistry and other related science and technology. IUPAC became an official organization that served as a catalyst. This body aims to promote standards and facilitate unambiguous communication around the world.
According to the IUPAC nomenclature, primary amines are named by substituting the 'e' from the alkane and adding the suffix amine.
In a given compound, the numbering starts from the carbon atom to which the amino group is attached. Hence, the IUPAC name of the given compound is propan-1-amine.
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can someone help me pls
The balanced chemical equations for the given reactions are:
16Ag + S₈ → 8Ag₂S
2 Al + 3 Br₂ → 2 AlBr₃
2 KClO₃ → 2KCl + 3 O₂
CH₄ + O₂ → CO₂ + 2 H₂O
2Al + 3 O₂ → Al₂O₃
2 H₂O₂ → 2 H₂O + 2 O₂
What is the balanced chemical equation?A balanced equation can be defined as an equation in which the number of atoms of every element involved in the reaction is equal on either side of the chemical equation.
The law of conservation of matter has to be obeyed by a balancing of a chemical equation.
By following the law of conservation of matter, the total mass of the elements of reactants will be equal to the total mass of products in a balanced chemical equation.
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57.8gS x 1mol/32.07gS and explain the answer
1.802molS
This is found by using the conversion factor: 1mol/32.07gS. This factor can be used to convert from grams of sulfur (given in the problem) to moles of sulfur. To use this conversion factor, divide 57.8gS by 32.07gS to find the number of moles of sulfur: 57.8gS / 32.07gS = 1.802molS.
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From the balanced equation of the first reaction, the mole ratio of NaOH to [tex]H_2[/tex] is 2:1.
Recall that: mole = mass/molar mass
Thus, 39.3 g of NaOH = 39.3/40 = 0.98 mol
The equivalent mole of [tex]H_2[/tex] from the mole ratio = 09.8/2 = 0.49 mol
1 mol of gas at STP = 22.4 L
0.49 mol = 0.49 x 22.4 = 10.98 L of [tex]H_2[/tex]
From the balanced equation of the second reaction, the mole ratio of [tex]SnO_2[/tex] and water is 1:2.
57.6 g of [tex]SnO_2[/tex] = 57.6/150.7 = 0.38 mol
Equivalent mole of water from the mole ratio = 0.38 x 2 = 0.76 mol
Since, mass = mole x molar mass
0.76 mol of water = 0.76 x 18 = 13.68 grams of water.
For the third equation, the mole ratio of propane and oxygen for a complete combustion reaction is 1:5. This can be converted to a volume ratio at STP.
Thus, with 0.828 L of propane, the equivalent volume of oxygen required for complete combustion would be:
0.828 x 5 = 4.14 L
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For a generic second-order reaction A → B, what quantity, when graphed versus time, will yield a straight line? Is the slope positive or negative and what does it represent? Match the items in the left column to the appropriate blanks in the sentences on the right.
A straight line will appear on the graph for second order of the inverse of concentration at time t vs. time t. The slope indicates K and is negative.
The straight line will appear on a graph showing the inverse of concentration at time t vs. time t. Chemical processes referred to as second order reactions are those in which the total of the exponents in the appropriate rate law of the chemical reaction equals two. The reaction is second order if the plot of reactant concentration vs time is not linear while the plot of reaction concentration divided by one is linear. And if we have to construct a graph of the second order reaction that is like time versus, it gives second, it gets straight line.
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O CHEMICAL BONDING = Drawing Lewis structures for simple organic compounds Draw the Lewis structure for iodoethane (C2H,1). Be certain you include any lone pairs. Ć c с IT ?
The Lewis structure for iodoethane (C2H,1) is as follows.
I - C - C - H
| |
H H
| |
H H
What is a Lewis structure?A Lewis structure, also known as a Lewis dot diagram, is a way to represent the bonding and non-bonding electrons in a molecule. It is named after Gilbert N. Lewis, who introduced it in 1916. A Lewis structure shows the chemical symbol of each atom in the molecule and the electrons that are involved in the chemical bonds. It is used to predict the molecular geometry, reactivity, and other chemical properties of a molecule.
In this structure, the central atom is the carbon atom, and the outer atoms are the hydrogen and iodine atoms. The carbon atoms each have four bonds, which are satisfied by the three hydrogen atoms and the iodine atom. The iodine atom has one lone pair, which is not shown in the structure.
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What volume of solvent should be added to 36.8 g of CH3OH to produce a 0.500 M solution of CH3OH?
1. 0.418 L
2. 73.6 L
3. 0.836 L
4. Not enough information is given
5. 184 L
6. 2.30 L
7. 0.598 L
The correct response is option 6, and 2.30 L must be added to 36.8 g of CH3OH to make a CH3OH solvent that is 0.500 M in volume. The OH functional group is where the Lewis base's characteristics originate.
As a result, CH3OH has properties that are shared by a weak acid and a base. Following primary alcohols are secondary and tertiary alcohols, then alkyl. As a primary alcohol, methanol is more potent than secondary and tertiary alcohols but less potent than water. Water, which dissolves all the ions and proteins in a cell and is the most common solvent used by living things, is also a solvent for polar compounds. In a particular volume of solvent, a varied amount of solute can dissolve depending on the temperature.
V = m / MWM = 36.8 / (32.04) (0.500) = 2.30L.
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Choose the correct pairing from the following possibilities. O CH3CH2CH2NH2, propylamine O CH3CH2OCHg, weak baseO CH2CH2NH2, ethyl ether O CH2CH2OCH2CH3, reacts with acid to form an ammonium salt.
The compound that can combine with the acid is propylamine. Option A
What is an ammonium salt?We have to note that the ammonium salt is the kind of salt that we get when we have an amine react with an acid. We have to note that the salt that is formed is based on the reaction of the amine group with the acid.
Based on the question that we have here, we can only see that we have one amine that can be able to react with the acid such that the amine group would lead to the formation of ammonium salt.
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100 g of calcium carbonate was heated until it decomposed to give calcium oxide and carbon dioxide. 56 g of calcium oxide was left. Work out the mass of carbon dioxide given off.
Answer:
44g of carbon dioxide was produced
Explanation:
If 100 g of calcium carbonate was heated until it decomposed to give calcium oxide and carbon dioxide and 56 g of calcium oxide was left. The mass of carbon dioxide, given off, is 44 g.
How to find the mass of carbon dioxide?According to the rule of conservation of matter, which stipulates that during a chemical reaction, matter cannot be generated or destroyed but can only be changed from one form to another,
We recognized that a reactant's total mass is equal to its total mass of products, that is,
The total mass of reactant is equal to the total mass of products
According to the above information, we can get the mass of CO₂ carbon dioxide, given off as follows:
CaCO₃ → CaO + CO₂
Mass of CaCO₃ is 100 g
Mass of CaO is 56 g
Mass of CO₂ =?
So, total mass of reactant = Total mass of products
Mass of CaCO₃ is equal to mass of CaO + mass of CO₂
100 = 56 + mass of CO₂
Mass of carbon dioxide = 100 – 56
Mass of carbon dioxide = 44 g
Thus, the mass of carbon dioxide, CO₂ given off, is 44 g.
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Explain why a covalent compound has to be given to us; why can't we predict them as we would an ionic compound?
The properties of the covalent compounds differ from those of the ionic compounds hence the covalent compounds must be given to us.
What are ionic compounds?We know that the ionic compounds has to do with the compounds that are able to dissolve well in the solution. This implies that they are soluble in water. If they are soluble in water then we can be able to know that they are ionic.
The ionic substance can also be know to have a high melting point as well as a high boiling point. Having said all of these as we have seen above, we can see that the ionic compound is quite different from the covalent compound.
All of the covalent compounds that we have do not show any of the properties that I have described above for the ionic compound hence they must be given to us.
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How to prepare dry crystals of the soluble salt cobalt(II) chloride-6-water from the insoluble base cobalt(II) carbonate.
The acid hydrogen chloride(HCl) could be used to prepare dry crystals of salt cobalt(II) chloride-6-water from the insoluble base cobalt(II) carbonate.
How are cobalt(II) chloride-6-water salts prepared?A beaker with acid (HCl) added should be heated over a bunsen burner flame. Stir the heated, acid with the insoluble base cobalt(II) carbonate until the base is overly present. To get rid of the extra base, filter the mixture into an evaporating basin. Heat the solution to cause water to evaporate and to reach saturation. Dip a cool glass rod into the solution to examine whether crystals grow on the end to determine if the solution is saturated. Allow the filtrate to dry and crystallize in a warm area.Equation of the reaction:
cobalt(II) carbonate + Hydrogen chloride => cobalt(II) chloride + Hydrogen-carbonate
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what are the products of Zn(s)+Ag2SO4(aq)⇒
Answer:
Zn(s) + Ag2SO4(aq) ⇒Ag + ZnSO4
Explanation:
This is a single replacement equation
A +BC ⇒ B + AC
Give the ground state electron configuration for Pb. Be sure to put the sublevels in order of increasing energy
The arrangement of the ground state electrons for lead i.e Pb is [tex][Xe] 6s^2 4f^{14} 5d^{10} 6p^2[/tex]
Pb has an atomic number (Z) of 82. As a result, Pb contains 82 electrons. Electronic configuration is the arrangement of electrons in different atomic orbitals (or subshells) of an atom. The electrons are grouped in ascending order of orbital energy according to the Aufbau principle (or, subshells).
Following is a list of the different orbitals' electron filling orders:
Are as follow
1s, 2s, 2p, 3s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, and 7s, 5f.
Consequently, the electron configuration of lead (abbreviated) is as bellow
[tex][Xe] 6s^2 4f^{14} 5d^{10} 6p^2[/tex]
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Beer is a brewed and fermented beverage made from ________ and flavored with ________.
a. malted barley, starchy cereals;hops
b. grapes;fruits
c. yeast;barley
d. hops;grains and wheat
Beer is an alcoholic beverage that is brewed and fermented, often using malted barley, water, yeast, and hops for flavor.
What fermented substance is beer made from?It is made by brewing and fermenting carbohydrates primarily sourced from cereal grains, most frequently malted barley, though it can also be made from wheat, maize (corn), rice, and oats. Beer is created during the brewing process by fermenting the starch sugars in the wort, which results in the production of ethanol and carbonation. Wine, beer, and spirits are the three divisions of alcoholic beverages.
Fermentation is the method used to create wines, beers are brewed, then fermented, and spirits are first fermented, then distilled. Let's begin at the beginning. Grain, hops, yeast, and water are the four ingredients used to make beer.
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some hydrogen gas is collected over water at 25.0 c. the levels of water inside and outside the gas-collection bottle are the same. the partial pressure of hydrogen is 745.5 torr. what is the barometric pressure at the time the gas is collected?
The barometric pressure at the time the gas is collected is found to be 1.0129 bar.
What effects does barometric pressure have on people?In addition to influencing the weather, barometric pressure can also have an impact on a person's health. Headaches, joint discomfort, and several other symptoms can result from variations in the partial oxygen pressure caused by changes in barometric pressure.
vapor pressure of pure water at 25°C = 18 mm Hg => 0.0239bar
partial pressure of hydrogen = 745.5 torr =>0.989 bar.
Pi = Po
Pi = Ph + Pw => 0.989 + 0.0239 => 1.0129 bar.
Do you get tired when the barometric pressure is high?Rainy weather's low light levels can cause melatonin levels to rise, which might make you feel sleepy. The impact of barometric pressure during wet weather is another another factor that contributes to fatigue or feeling "low."
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What volume, in liters, of 4.0 M LiBr solution can be made using 100.0 g LiBr?
Answer:
To make a 4.0 M LiBr solution with 100.0 g of LiBr, you will need to make a total volume of 25.0 L. This is calculated using the formula: volume = (moles of solute) x (molarity of solution) x (volume of solution). In this case, the moles of solute is 2.5 mol LiBr (calculated using the formula moles = mass/molar mass), the molarity of the solution is 4.0 M, and the volume of the solution is 25.0 L. Therefore, the total volume of the 4.0 M LiBr solution made with 100.0 g of LiBr is 25.0 L.
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in a closed vessel containing water, the pressure is 18 torr. if we add more water to the vessel, this equilibrium pressure would...
The pressure in a closed vessel holding water is 18 torr; if more water were to be added, the equilibrium pressure would not change.
A closed vessel holding water has a pressure of 18 torr; adding more water would not affect the equilibrium pressure.
Vapor pressure is the force that a vapour produces when it is in equilibrium with its liquid phase. Any liquid present has no impact on the vapour pressure (the actual amount of liquid is irrelevant). The only variable that affects a substance's vapour pressure is its temperature.
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Predict the products of the reaction in words or formulas based on what is given.
Ca + MgS →
Ca + MgS → CaS + Mg might be an ionic equation. The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products. A product is a substance that is present at the end of a chemical reaction.
Define ionic equation?Ionic equations are chemical equations that express the electrolytes in aqueous solution as dissociated ions, similar to molecular equations which express compounds as molecules.In an ionic equation, the electrolytes in aqueous solution are expressed as dissociated ions.A molecular equation is one in which the compound formulas are expressed as though all substances are molecules. A dissolved ionic substance is represented as free ions in an ionic equation.All soluble ionic compounds (those denoted with a (aq)) must be broken down into their corresponding ions in order to write the ionic equation. Each ion needs to be displayed with its charge and a (aq) to signify that it is in solution.To learn more about ionic equation refer to:
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A wave was measured to have an energy of 3.810x1020J. What was the wavelength of
that EM wave?
Each mass element in the string with length x has kinetic energy K = 1 2 m v 2 and is oscillating perpendicular to the direction of the wave's travel, K = 1 2 (m) v y 2. Each mass component of the string with length x has a kinetic energy of K = 1 2 (x) v y 2 when the constant linear mass density is used.
What was the wavelength of EM wave?The frequency f, wavelength, or photon energy E are the three physical parameters that are generally used to characterize electromagnetic waves. From 2.4 to 10 Hz (1 GeV gamma rays) down to the local plasma frequency of the ionized interstellar medium (around 1 kHz), frequencies have been observed in astronomy. Gamma rays have extremely tiny wavelengths that are fractions of the size of atoms, yet wavelengths on the other end of the spectrum might be infinitely long. This is because the wavelength is inversely related to the wave frequency. Gamma ray photons have the maximum energy (about a billion electron volts), but radio wave photons have very little energy since photon energy is directly related to wave frequency (around a femtoelectronvolt).
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What volume of hydrogen gas (measured at STP) would result from reacting 75.0g of sodium hydroxide with 50.0g of aluminum
Answer:
82.9 L of H2
Explanation:
We need to start with a balanced equation. The following looks correct:
2NaOH+2Al+2H2O = 2NaAlO2 + 3H2
This tells us to expect 3 moles of H2 gas for every 2 moles of sodium hydroxide. It also tells us that we need 2 moles of Al for every 2 moles of NaOH.
Now calculate the moles of both the sodium hydroxide and the aluminum:
NaOH: The molar mass is 40.0 g/mole
(75g NaOH)/(40.0 g/mole) = 1.875 moles NaOH
Al: The molar mass is 27.0 g/mole
(50.0g Al)/(27.0 g/mole) = 1.85 moles Al
The values are close, but the reaction will stop when all the moles of Al are consumed, leaving 0.025 moles of NaOH, since they are consumed at the same proportion, as per the balanced equation.
The equation says we should expect 3 moles H2 gas for evey 2 moles of Al. So:
(1.85 moles Al)*(3 moles H2)/(2 moles Al) = 3.7 moles of H2
At STP, the conversion factor for all gasses is 22.4L/mole (STP only).
(3.7 moles of H2)*(22.4L/mole) = 82.9 L of H2
