Question

A sample of propane, C3H8, contains 15.5 moles of carbon atoms. How many total moles of atoms does the sample contain?
Express the total number of moles of carbon and hydrogen numerically.

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

Answer 2

We have that the total number of moles of carbon and hydrogen numerically. is

X=57moles

From the question we are told

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

Express the total number of moles of carbon and hydrogen numerically

Generally the equation for the number of Carbon  is mathematically given as

$m_c=\frac{15.5}{3}$

$m_c=5.13$

Since

H =8 in C3H8

Therefore

$m_h=8*5.13\\\\m_h=41$

Therefore

the total number of moles of carbon and hydrogen numerically.

is

$X=41+15.5$

X=57moles

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