We know
[tex]\boxed{\star{\sf No\;of\:atoms=No\:of\: moles\times Avagadro's\: number}}[/tex]
[tex]\\ \rm\Rrightarrow No\:of\;moles=\dfrac{No\:of\:atoms}{Avagadro's\:no}[/tex]
[tex]\\ \rm\Rrightarrow No\:of\:moles =\dfrac{9.46\times 10^{23}}{6.022\times 10^{23}}[/tex]
[tex]\\ \rm\Rrightarrow No\:of\:moles=1.6mol[/tex]
Again
[tex]\boxed{\star{\sf Mass=Molar\:mass\times No\:of\:moles}}[/tex]
[tex]\\ \rm\Rrightarrow Mass=1.6(14)[/tex]
[tex]\\ \rm\Rrightarrow Mass=22.4g[/tex]
why is it suggested to use soap to a person suffering from bee or ant bite?
Because the ant bite or bee bite contains acid which gets neutralized by the base in the soap.
Thanks Hope it helpsDental crown: Uranium-234 is used to make dental crowns appear brighter. The alpha decay of uranium-234 produces what isotope?
Answer:
Lithium has two naturally occurring isotopes. Lithium-6 has an atomic mass of 6.015 amu. Lithium-7 has an atomic mass of 7.016 amu. The average atomic mass of lithium is 6.941 amu.
Explanation:
Which model could represent a neutral atom of oxygen?
А 1
B. 4
O O O O
o 2
Answer:
it will be b because it is the atom oxygen
Answer:D
Explanation:
I just did it.Brainlist please
Which statement correctly describes what happens to Li and Cl atoms when they bond? a . Li loses 1 valence electron and becomes a negative ion, Cl gains 1 valence electron and becomes a positive ion . b. loses 1 valence electron and becomes a positive ion, gains 1 valence electron and becomes a negative ion. . Li gains 1 valence electron and becomes a negative ion, loses 1 valence electron and becomes a positive ion. d . Li gains 1 valence electron and becomes a positive ion, loses 1 valence electron and becomes a negative ion.
Taking into account the definition of ionic bond, Li loses 1 valence electron and becomes a positive ion and Cl gains 1 valence electron and becomes a negative ion.
Definition of ionic bondAn ionic bond is a type of chemical bond that occurs when one atom gives up an electron to the other, in order for both to achieve electronic stability.
This union normally occurs between metal and nonmetal elements with different electronegativity, which means that the elements have different capacity to attract electrons.
In other words, an ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions. Usually, the metal gives up its electrons forming a cation to the nonmetal element, which forms an anion.
Bond between Li and ClLi is a metal, while Cl is a nonmetal. Considering the definition of ionic bond, the Li gives up its electrons forming a cation to the Cl, which forms an anion.
In summary, Li loses 1 valence electron and becomes a positive ion and Cl gains 1 valence electron and becomes a negative ion.
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Is Fahrenheit used in England for the temperature at all?.
Answer:
No, i don't believe so, Fahrenheit is one of those thinks America did like ft. and inches.
Explanation:
What other aspects of a catalyzed reaction are different from the uncatalyzed reaction?.
Answer:
less activation energy
Is it possible to replace our dependency on fossil fuels with alternative renewable energy's?
Answer:
yes, coal for example produces energy by burning but there are several alternatives such as water or solar which are 2 growing energy sources.
Explanation:
hope this helps!
A tennis player hits a 0.1-kilogram tennis ball with her racket from the north end of a court. Her racket was traveling at 65 kilometers per hour. The ball accelerated at a rate of 10 meters per second squared. The player on the south end of the court hit the tennis ball with her racket at 75 kilometers per hour. How much force did the racket on the south end of the court exert on the ball?(1 point)
7.5 N
1 N
6.5 N
0.01 N
Answer: 1 N
Explanation: i took the test
The force exerted by the racket on the south end on the ball is 1.2 N.
What is Newton's second Law ?Newton's second law states that, force applied on an object is the rate of change of momentum of the body.
Here,
Mass of the tennis ball, m = 0.1 kg
Initial velocity of the ball, v₁ = 65 km/h = 18.06 m/s
Distance travelled by the ball, S = 23.78
Using the second equation of motion,
S = v₁t + 1/2at²
23.78 = 18.06t + 5t²
Solving the quadratic equation, we get,
t = 1.7 s
We know,
F = ΔP
F = mv₂ /t
F = 0.1 x 20.83/1.7
F = 1.2 N
Hence,
The force exerted by the racket on the south end on the ball is 1.2 N.
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When 0.25 g of the organic compound naphthalene are burned in a bomb calorimeter, the temperature of the water in the
calorimeter increases from 24.00°C to 26.43 °C. The calorimeter's heat capacity is 4.13 kJ/°C. How much heat (9rxn) in kilojoules is
released by the combustion of the naphthalene?
The heat released by the combustion of the naphthalene is mathematically given as
H=2.508975 KJ
What is heat released?
Question Parameters:
0.25 g of the organic compound naphthalene
The calorimeter increases from 24.00°C to 26.43 °C.
The calorimeter's heat capacity is 4.13 kJ/°C
Generally, the equation for the Heat released is mathematically given as
H = mCdT
Therefore
H= mC ( T2 - T1)
H= 0.25*4.13 ( 26.43- 24)
H= 2.508975 KJ
In conclusion, the heat released by the combustion of the naphthalene is
H=2.508975 KJ
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Explain the three processes of nuclear change and what is produced during as a result of that change PLS HELP
Answer:
I don't know how to do right now
When boiling water, is it best to use cold or hot water?.
Answer:
Use cold water instead of hot for cooking: hot water will contain more dissolved minerals from your pipes, which can give your food an off-flavor, particularly if you reduce the water a lot. Water that's been frozen or previously boiled will boil faster.
Explanation:
What is the difference between heterochromatin and euchromatin.
Answer:
The main difference between the two is euchromatin is genetically active while heterochromatin is genetically inactive
Answer:
Heterochromatin is the part of the chromosome without DNA coding genes and Euchromatin is the part of the chromosome with coding genes.
Explanation:
Euchormatin is the part of the chromosome which is rich with gene concentration and participates in the transition process. Heterochromatin is th area with a darkly stained DNA specific strand and is a condensed state.
What substance would be soluble in water?
A - NH3 because it’s polar
B - BR2 because it’s non polar
C - H2 because it’s polar
D - CO2 because it’s non polar
Answer:
A
Explanation:
Since water is polar, we need for there to be a polar solute. This eliminates options B and D.
Now to choose between A and C, we can look at the compounds mentioned.
For A, NH3 is mentioned, which is a polar substance.
However, for C, H2 is mentioned, which is a nonpolar molecule, contrary to what is stated by the option.
Therefore, A is the answer.
What did John Dalton theorize?
Answer:
Dalton theorized that the law of conservation of mass and the law of definite proportions could be explained using the idea of atoms. He proposed that all matter is made of tiny indivisible particles called atoms, which he imagined as "solid, massy, hard, impenetrable, movable particles.
Explanation:
how can we use models to classify states of matter and the changes it undergoes
Answer:
Matter can exist in one of three main states: solid, liquid, or gas.
Solid matter is composed of tightly packed particles.
Liquid matter is made of more loosely packed particles.
Gaseous matter is composed of particles packed so loosely that it has neither a defined shape nor a defined volume.
Explanation:
How much Mercury (II) Oxide is needed to produce 198g of Oxygen?
Answer:
The Same Of this Equetion Answer
Explanation:
First we need to convert the chemical equation that you wrote out in words into a chemical equation with compounds and coefficients. The balanced chemical equation looks like this:
2 HgO (s) --> 2 Hg (l) + O2 (g)
Now we need to convert the 55.7 g of HgO into moles of HgO. To do this, we find the molar mass of HgO. The periodic table tells us that the atomic mass of one Hg is 200.59. The periodic table also tells us that the atomic mass of one O is 15.999. Thus, the molar mass of HgO is 200.59 + 15.999 = 216.589 grams. That is, one mole of HgO = 216.589 grams of HgO.
We need to figure out how many moles are in 55.7 grams of HgO. We calculate this by doing 55.7 divided by 216.589. The calculator says that 55.7 / 216.589 = 0.25716911. So 55.7 grams of HgO is equal to 0.25716911 mole of HgO.
Now we use the coefficients in the balanced equation to convert from moles of HgO to moles of O2. The equation to convert looks like this:
moles of HgO x coefficient of O2
coefficient of HgO
In case the formatting messes up, this is moles of HgO multiplied by (coefficient of O2 / coefficient of HgO). We already know the moles of HgO (it's the 0.25716911 moles of HgO that we just calculated). The coefficients come from the balanced equation; here it is again: 2 HgO (s) --> 2 Hg (l) + O2 (g) . The coefficient of HgO is 2, and the coefficient of O2 is 1. (Remember that if there is no visible coefficient, the coefficient is 1.) If we put these numbers in the equation to convert, the equation to convert looks like this:
0.25716911 moles of HgO x 1
2
If you can't see this, we do 0.25716911 x (1/2). The calculator says that 0.25716911 x (1/2) = 0.12858455. Thus, we have 0.12858455 moles of O2. Remember that the question asks for the volume of O2. Now we need to use the ideal gas equation to find the volume of the 0.12858455 moles of O2. The ideal gas equation is:
PV = nRT
Remember that P is pressure in atm, V is the volume of the gas in liters, n is the number of moles of the gas, R is the ideal gas constant, and T is the temperature in Kelvin. So far we know that P = 1 atm (the problem gave us this information), V is what we want to find, n = 0.12858455 moles of O2, and T = 25 degrees Celsius. But we must have the temperature in Kelvin, so we convert from Celsius to Kelvin with the equation
K = C + 273.15. Since the temperature is 25 degrees Celsius, K = 25 + 273.15 = 298.15. So the temperature is 298.15 K. Finally, R = 0.082057 L*atm/(K*mol). (You can look up the value for R in a table or chart; you don't need to memorize it.) Once we put these values into the ideal gas equation, the ideal gas equation looks like this:
1*V = (0.12858455)*(0.082057)*(298.15)
Since 1*V is equal to V, we can just write V instead of 1*V. So our equation looks like this:
V = (0.12858455)*(0.082057)*(298.15)
Now we just multiply the numbers together. The calculator says that (0.12858455)*(0.082057)*(298.15) = 3.14589. Remember that the correct unit for volume is liters. Thus, the volume of O2 is 3.14589 L. We should round to 3 significant figures because the problem gave us the number 55.7 (which has 3 significant figures). If we round 3.14589 to 3 significant figures, we get 3.15. Thus, the answer is 3.15 L of O2.
Which of the following statements about recycling electronic waste is true?
Exporting electronic waste is part of a safe recycling process.
Electronic waste is recycled using the same process as plastic and metal.
Over 60 percent of electronics waste worldwide is recycled safely.
Minerals can be extracted from recycled electronics.
Answer:
minerals can be extracted from recycled electronics
Explanation:
The which is true about electronic waste is minerals can be extracted from recycled electronics.
What is electronic waste?The waste which are the residue of the electrical devices which we used in our daily life is known as electronic waste.
In the electrical devices many metals and non metals are present and when we recycle this electrical waste then again we get that useful materials from the waste in the form of minerals, because all that metals, non metals or any other element will get in combined form.
Hence, option (d) is correct.
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I will give BRAINLIEST. 1. A spiderweb and a Kevlar jacket have some obvious differences. Which property is similar between the web and the jacket?
- surface area
- thickness, expressed as a number of atoms
- overall strength
- arrangement of atoms in molecules
2. Assuming silk from spiderwebs could be made just as strong as Kevlar, why would a company still choose to use Kevlar in producing bulletproof fabrics?
- A much larger amount of silk might be needed to produce the same effect.
- Spiderweb silk would likely be rejected by the body.
- The cost might be higher for producing spiderweb silk.
- Spiderweb silk likely involves more chemicals.
3. Which microscopic detail affects the strength of different forms of silk?
- Different silk strands are made with different types of atoms.
- Different types of silk are in long strands or in other very different arrangements.
- Different silk strands have different combinations of amino acids.
- Different types of silk do not have the same strength if they come from different sources.
4. Which type silk is the strongest?
- nonbiodegradable
- minor ampullate
- major ampullate
- biodegradable
5. Which natural source has been bioengineered to make silk proteins?
- mulberry leaves
- goat milk
- goat hair
- mulberry bark
Answer:
.arrangement of atoms in molecules.A much larger amount of silk might be needed to produce the same effect.- Different silk strands have different combinations of amino acids. .major ampullate.goat milkWhat is the difference between a solvent molecule and a non polar solvent?
Answer:
Polar molecules occur when there is an electronegativity difference between the bonded atoms. Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out. Polar solvents have large dipole moments (aka “partial charges”); they contain bonds between atoms with very different electronegativities, such as oxygen and hydrogen. Non polar solvents contain bonds between atoms with similar electronegativities, such as carbon and hydrogen (think hydrocarbons, such as gasoline).
Hope this helps, please let me know If I'm wrong.
A student is extracting caffeine from water with dichloromethane. The K value is 4.2. If the student starts with a total of 30 mg of caffeine in 2 mL of water and extracts twice with 2 mL of dichloromethane, how much caffeine will be in the dichloromethane extract
Answer:
787.5 is a transversal of lines I and m that forms 8 angles and the other way around the world health organization and the other one is a transversal of lines I and m that forms 8 angles and the other things that you can see in the picture of with the first term 8 and a common ratio of the following values would be a little different to the one you have the
1. Would a small atom (less than 40 protons) be found in nature if it has the same number of protons and neutrons (1:1 ratio)? Explain.
2. Would a large atom (more than 40 protons) be found in nature if it had the same number of protons and neutrons? Explain.
Answer:
1.Yes, it would be found in nature, 1:1 ratio of proton=neutron.
2.No, since it is more likely for atoms with an atomic number greater than 50 to have a 1.5:1 ratio.
Explanation:
hope this helps
1. Yes, it would be found in nature, 1:1 ratio of proton=neutron.
2. No, since it is more likely for atoms with an atomic number greater than 50 to have a 1.5:1 ratio.
Would a large atom (more than 60 protons) be found in nature if it has the same number of protons and neutrons?No, since it is more likely for atoms with an atomic number greater than 50 to have a 1.5:1 ratio.
Why is the neutron to proton ratio so important?The ratio of neutrons to protons (n/p) is a successful way of predicting nuclear stability. This ratio is close to 1 for atoms of elements with low atomic numbers (of less than about 20 protons). The n/p ratio steadily increases as the atomic number increases past element 20 (calcium) to about element 84 (polonium).
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What is the chemical equation of the boiling of water?.
Answer:
Boiling of pure water is not a chemical reaction.
It is a physical change from liquid state to gaseous state.
Explanation:
For the balanced equation shown below, how many moles of CO2 will react with 0.708 moles of H2O.
3CO2 + 4H2O --> C3H8 + 5O2
** im pretty sure it needs to be rounded to the tenth
Answer:
0.5 moles of CO2 will react with 0.708 moles of H2O.
Explanation:
[tex]\sf balanced \ equation = 3CO2 + 4H2O \rightarrow C3H8 + 5O2[/tex]
0.708 moles of H2Ousing molar ratio:
4H2O : 3CO2
4 : 3
so H2O moles:
[tex]\sf\dfrac{0.708}{4} *3[/tex]
[tex]\sf 0.531[/tex] moles of CO2
A solution has a pH of 4. 20. Using the relationship between pH and pOH, what is the concentration of OH−? A. 9. 9 × 10-1 M B. 6. 2 × 10-1 M C. 6. 3 × 10-5 M D. 6. 7 × 10-6 M E. 1. 6 × 10-10 M.
1.6 x 10⁻¹⁰ M is the concentration of OH− ion of the solution has a pH of 4.20.
How we calculate the pH of any solution?pH of any solution is define as the negative logarithm of the concentration of hydrogen ions i.e. pH = -log[H⁺].
Equation of pH will be written in the form of base 10 by removing the log as:
[H⁺] = [tex]10^{-pH}[/tex]
Given value of pH is 4.20 and concentration of H⁺ ions will be calculated as:
[H⁺] = 10⁻⁴°²⁰
[H⁺] = 6.3 × 10⁻⁵
Now the relation between pH & pOH in term of base 10 is:
[H⁺][OH⁻] = 10⁻¹⁴
[OH⁻] = 10⁻¹⁴ / [H⁺]
[OH⁻] = 10⁻¹⁴ / 6.3 × 10⁻⁵ = 1.6 x 10⁻¹⁰ M
Hence, option (E) is correct i.e. 1.6 x 10⁻¹⁰ M.
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can use greenhouse gases or wasted heat or by-products as input for process to generate any form of energy (in simple way in small scale as a prototype)
Why is degrees used in measuring angles and temperature?.
What is the molarity of 0. 0688 g CoF2 in 20. 0 mL of solution?
Answer: 0.035 M
Explanation:
The primary goal of water-softening ion exchange systems is
…
A) removing magnesium and calcium from water.
B) introducing sodium into water.
C) removing sodium from water.
D) introducing magnesium and calcium into water.
The primary goal of water-softening ion exchange systems is to remove calcium and magnesium from water.
Water-softeningWater-softening process involves ion exchange system, this process removes the chemical elements that makes water hard
The purpose of this ion exchange is to reduce calcium and magnesium content of hard water.
Thus, the primary goal of water-softening ion exchange systems is to remove calcium and magnesium from water.
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Designing a Chemical System Quick Check
1. removing magnesium and calcium from water.
2. Untreated water is subjected to high pressure, causing it to move through a semi-permeable membrane, which captures contaminants.
3. An ion exchange system would likely be chosen because it does not require specialized maintenance or regular replacement of components.
4. They are likely to choose reverse osmosis because it addresses a wider range of problems, including bacteria.
5. This treatment removes bacteria, but not other pollutants.
What two processes are necessary to make oil quizziz.
Answer: organic matter and salt water. heat and pressure. erosion and deposition.
Explanation: Hope this helps ;)
Sodium metal reacts with aqueous magnesium sulfate to form sodium sulfate solution and
magnesium metal
Answer:
Na(s) + MgSO4(aq) -> Na2SO4(aq) + Mg(s)
Explanation:
Sodium metal reacts easily with magnesium sulfate to form sodium sulfate solution and magnesium metal as per the equation written below:
[tex]\rm 2Na + MgSO_{4} \rightarrow Na_{2}SO_{4} + Mg[/tex].
What is magnesium sulphate?Magnesium sulphate is an inorganic salt formed by magnesium metal and other sulphate compounds. The valency of both magnesium and sulphate group is 2.
Magnesium metal donates two electrons to the sulphate group and forms compound MgSO₄. When magnesium sulphate reacts with sodium metal the sulphate group is replaced into the sodium metal thus it is an example of displacement reaction.
The valency of sodium is one and hence two moles of sodium metal reacts with one mole of magnesium sulphate and the balanced reaction is written as follows:
[tex]\rm 2Na + MgSO_{4} \rightarrow Na_{2}SO_{4} + Mg[/tex].
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