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

Option (D). contains the same number of molecules

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.

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.