Question

A sample of propane, C 3 H 8 , contains 14.1 moles of carbon atoms. How many total moles of atoms does the sample contain?

Answer 1

Answer:50.4 moles of atoms are present in the sample.

Explanation:

Moles of carbon atom in propane = 14.1 moles of atom

Number carbon atoms $14.1 mole\times 6.022\times 10^{23}=8.4\times 10^{24} atoms$

In one molecule of propane there are 3 carbon atoms and 8 hydrogen atoms

For 1 carbon atom there are = $\frac{8}{3}$ hydrogen atoms

Number of hydrogen atom for $8.4\times 10^{24} atoms$ of carbon :

$=8.4\times 10^{24}\times \frac{8}{3} atoms=2.2\times 10^{25} atoms$

Total number of atoms =$8.4\times 10^{24} atoms+2.2\times 10^{25} atoms$

$=3.04\times 10^{25}$ atoms

$Moles=\frac{\text{Total number of atoms}}{6.022\times 10^{23}}$

$Moles=\frac{3.04\times 10^{25}}{6.022\times 10^{23}}=50.4$

50.4 moles of atoms are present in the sample.