Question

How many carbon atoms are in 2.12 mol of propane (C3H8)? How many hydrogen atoms are in 2.12 mol of propane?

Answer 1

Answer : The number of carbon atoms present in propane is, $38.29\times 10^{23}$ and the number of hydrogen atoms present in propane is, $102.13\times 10^{23}$

Solution : Given,

Moles of propane = 2.12 moles

In propane molecule, there are 3 carbon atoms and 8 hydrogen atoms present.

As we know that 1 mole of gas contains $6.022\times 10^{23}$ number of atoms

First we have to calculate the number of carbon atoms.

As, 1 mole of gas contains $3\times 6.022\times 10^{23}$ number of carbon atoms

So, 2.12 mole of gas contains $3\times 2.12\times 6.022\times 10^{23}=38.29\times 10^{23}$ number of carbon atoms

Now we have to calculate the number of hydrogen atoms.

As, 1 mole of gas contains $8\times 6.022\times 10^{23}$ number of hydrogen atoms

So, 2.12 mole of gas contains $8\times 2.12\times 6.022\times 10^{23}=102.13\times 10^{23}$ number of hydrogen atoms

Therefore, the number of carbon atoms present in propane is, $38.29\times 10^{23}$ and the number of hydrogen atoms present in propane is, $102.13\times 10^{23}$

Answer 2

 3 carbons and 8 hydrogen = 11 atoms in propane.
per molecule.
2.12 mol C3H8 | 6.02 x 1023 molecules of C3H8 | 11 atoms.
| 1 mol C3.