1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Archy [21]
3 years ago
7

compare (a) the numer of atoms and (b) the number of grams present in 1.00 mole of helium and 1.00 mole of argon

Chemistry
1 answer:
WITCHER [35]3 years ago
8 0

<u>Answer:</u>

For a: The number of atoms of both the gases remains the same.

For b: The number of grams of 1 mole of argon is more than 1 mole of helium by 35.95 grams.

<u>Explanation:</u>

  • <u>For a:</u>

To calculate the number of atoms, we use mole concept.

According to mole concept:

1 mole of an element contains 6.022\times 10^{23} number of atoms.  

We are given two gases of same number of moles.

Therefore, 1 mole of helium gas will contain 1\times 6.022\times 10^{23}=6.022\times 10^{23} number of atoms.

and, 1 mole of argon gas will contain 1\times 6.022\times 10^{23}=6.022\times 10^{23} number of atoms.

Hence, number of atoms of both the given gases remains the same.

  • <u>For 2:</u>

As, the molar mass of both the gases are different, so their masses in 1 mole will be different.

To calculate the number of moles, we use the equation:

\text{Number of Moles}=\frac{\text{Given mass}}{\text{Molar mass}}

  • Calculating the mass of Helium in 1 mole:

Molar mass of helium = 4 g/mol

Putting the values in above equation, we get:  

1mol=\frac{\text{Given mass}}{4g/mol}=4grams

  • Calculating the mass of Argon in 1 mole:

Molar mass of Argon = 39.95 g/mol

Putting the values in above equation, we get:  

1mol=\frac{\text{Given mass}}{39.95g/mol}=39.954grams

Calculating the difference of masses of both the gases = (39.95 - 4)g = 35.95g

Therefore, the mass of argon is more than mass of helium by 35.95 grams.

You might be interested in
Which type of pollution includes CFCs and smog?
Elina [12.6K]
Air pollution exist in two forms namely ozone and particle pollution. CFCs and smog are under the ozone form of pollution. Ozone type of pollution is mostly formed by reaction between the sunlight and the vapors that are emitted due to human activities. 
5 0
3 years ago
Read 2 more answers
Which of the following solutions represents a good buffer system? a solution that is 0.10 mol L-1 NaOH and 0.10 mol L-1 KOH a so
Goshia [24]

Answer:

chu papi

Explanation:

4 0
2 years ago
Use the balanced equation from number four above to determine the limiting reactant if we had a mixture of 5.0 moles of Fe and 4
Tom [10]

Answer:

2Fe + 3O₂  →  2Fe₂O₃

Limiting reactant: O₂

2Fe + O₂ → 2FeO

Limiting reactant: Fe

Explanation:

2Fe + 3O₂  →  2Fe₂O₃

2Fe + O₂ → 2FeO

These are the possible reactions:

In first case, 2 moles of Fe need 3 mol of oyxgen to react

If I have 5 moles of Fe, I will need (5 .3)/2 = 7.5 moles of O₂

Then, the oxygen is my limiting ( I only have 4 moles)

3 moles of O₂ need 2 moles of Fe

If I have 4 moles of O₂, I will need (4 .2)/3 = 2.66 moles (I have 5)

Fe, is the reactant in excess.

For second case, 2 moles of Fe need 1 mol of O₂, to react.

If I have 5 moles of Fe, I will need ( 5 .1) / 2 =2.5 moles of O₂

I have 4 moles of oxygen, so now it is my excess.

1 mol of O₂ need 2 moles of Fe, to react

If I have 4 moles of O₂, I will need the double of amount, 8 moles of Fe.

I have 5 moles, then the Fe is my limtiing reactant.

8 0
3 years ago
I need help Immediately oleae
Burka [1]

Answer:

B) atom 1 and atom 4

Explanation:

5 0
3 years ago
What would happen if the number of protons were to change in an atom
Reptile [31]

you would change one element to a diffrent element

3 0
3 years ago
Other questions:
  • The electron configuration of calcium is
    8·2 answers
  • Why is the sun up sometimes but not other times?
    14·1 answer
  • Enter your answer in the provided box. Calculate the number of moles of CrCl, that could be produced from 49.4 g Cr202 according
    8·1 answer
  • Twenty irregular pieces of an unknown metal have a collective mass of 28.225 g. When carefully placed in a graduated cylinder th
    12·1 answer
  • Net ionic equation for Barium chloride​
    8·1 answer
  • Deposition examples?
    14·1 answer
  • One liter of gas A at 1.0 atm pressure has a temperature of 25°C while the same volume and pressure of gas B has a temperature o
    8·1 answer
  • The molar ratio of HPO42- to H2PO4- in a solution is 1.4. Calculate the pH of the solution. Phosphoric acid (H3PO4) is a triprot
    7·1 answer
  • 239<br> 239<br> -<br> 93Np<br> 94Pu + c
    5·1 answer
  • A gaseous substance turns directly into a solid. Which term describes this change?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!