Question

The molecular weight of H2 and the mass of 1 mole of H2 are _____.

a.quantities
b.different quantities
c.inversely related
d.not the same

Answer 1

The molecular weight of H2 and the mass of 1 mole of H2 are quantaties. The mass of 1 mole of H2 is 2.01588g while the molecular weight of H2 is also 2.01599g. This means they are both the same amount of H2.

Answer 2

Answer: a. same quantities

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

Molecular weight of
`H_2` = 2.0 g/mol

To calculate the moles, we use the equation:

`\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}`

`\text{Number of moles}=(2g)/(2g/mol)=1 mole`

Now 1 mole of
`H_2` molecule contains =
`6.023* 10^(23)` of molecules.

Thus both represent same quantities.