Question

Which of the following gases would have the greatest volume at STP?

A. 5.00 moles of H2 gas

B. 5.00 g of Rn gas

C. 6.02 × 1023 particles of Ne gas

D. All of the above will have the same volume at STP.

E. Can't determine from the information given.

Answer 1

1 mol gas = 22.4 liter
So what's the volume of option A?

Answer 2

112?

Answer 3

Yes that's correct
now for B, we don't have moles but gram. Do you know how to convert gram to mol?

Answer 4

5.0086 ?

Answer 5

molar mass of Rn = 222 g/mol
we have 5 gram
gram -> mol = divide by molar mass
5/222= \(\sf 2.25*10^{-2}\) mol

\(\sf 2.25*10^{-2}\)* 22.4 = 0.504 liter

So A still has a greater volume

Now for C

Answer 6

1.21484 for C?

Answer 7

3 is the largest

Answer 8

LOL 112 and 22.4 which one is larger :)

Answer 9

112

Answer 10

So A is the correct answer?

Answer 11

yup :)

Answer 12

So it's 'A'

Answer 13

6.02 × 10^23 is avogadro's number, which means there is 1 mol of Ne gas
1 mol gas = 22.4 liter so we have A 112 B 0.5 and C 22.4
A is obviously the greatest volume :)