Question

How many molecules are contained in 1.55 moles of methane, CH 4 ?

Answer 1

Avogadro's law states that in one mole of a substance, there are
`6.022 * 10^(23)` molecules.

This means that in 1.55 moles, there are
`1.55(6.022 * 10^(23))=\boxed{9.33 * 10^(23) \text{( to 3 sf)}}`