Question

How many moles are in 64 grams of methane, CH4?
A. 4
B. 32
C. 64
D. 13

Answer 1

A. 4.

Step-by-step explanation:

• We can use the relation:

no. of moles (n) = mass/molar mass.

mass = 64.0 g, molar mass = 16.0 g/mol.

∴ no. of moles (n) = mass/molar mass = (64.0 g)/(16.0 g/mol) = 4 mol.