Question

How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen?

A.) 1 mol of oxygen has fewer molecules.
B.) 1 mol of oxygen has more molecules.
C.) Each sample has the same number of molecules.
D.) The molecules cannot be compared without knowing the mass.

Answer 1

The answer is C.) Each sample has the same number of molecules. 

Answer 2

Answer: C.) Each sample has the same number of molecules.

Explanation: According to Avogadro's law, 1 mole of every substance contains Avogadro's number
`(6.023* 10^(23))`of particles.

1 mole of molecule contains Avogadro's number
`(6.023* 10^(23))`of molecules.

1 mole of oxygen molecule
`(O_2)` contains
`(6.023* 10^(23))` number of oxygen molecules.

1 mole of nitrogen molecule
`(N_2)` contains
`(6.023* 10^(23))` number of nitrogen molecules.

Thus both samples contain equal number of molecules.