Question

A sample of propane, C3H8, contains 15.5 moles of carbon atoms. How many total moles of atoms does the sample contain?

Answer 1

Answer:

H = 41.3 mol H; Atoms = 56.8 mol

Explanation:

A molecule of propane contains eight atoms of H for every 3 atoms of C or 8 mol H atoms for every 3 mol C atoms.

∴ $\text{Moles of H atoms} = \text{15.5 mol C atoms} \times \frac{\text{8 mol H atoms }}{\text{3 mol C atoms }} = \text{41.3 mol H atoms}$

Total atoms = 15.5 mol C atoms + 41.3 mol H atoms = 56.8 mol atoms