Question

At a certain temperature and pressure, 0.30 mol of carbon dioxide has a

volume of 6.7 L. A 6.7 L sample of hydrogen at the same temperature and
pressure
A) has the same mass
B) contains the same number of atoms
C) has a higher density
D) contains the same number of molecules

Answer 1

Option (D). contains the same number of molecules

Step-by-step explanation:

From the question given, we obtained the following data:

For CO2:

Number of mole = 0.3mol

Volume = 6.7L

For H2:

Volume = 6.7L

Recall 1mole of a gas occupy 22.4L.

1mol of H2 contains 22.4L

Therefore Xmol of H2 will contain 6.7L i.e

Xmol of H2 = 6.7/22.4 = 0.3mol

Since CO2 and H2 have the same number of mole, they will also contain the same number of molecules.