Answer:
of carbon in the sample.
73.7960 grams is the total mass of the sample.
Explanation:
Compound = ![C_3H_8](https://tex.z-dn.net/?f=C_3H_8)
Total numbers of hydrogen atoms in a compound =
atoms
In one molecule of compound there are 8 hydrogen atoms.
Then x number of molecules of compound having
hydrogen atoms.
![x=\frac{8.08\times 10^{24}}{8} molecules=1.01\times 10^{24} molecules](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B8.08%5Ctimes%2010%5E%7B24%7D%7D%7B8%7D%20molecules%3D1.01%5Ctimes%2010%5E%7B24%7D%20molecules)
In one molecule of compound there are 3 carbon atoms.
Then
of given compound will have :
of carbon
of carbon in the sample.
Moles of given compounds = n
![x=N_A\times n](https://tex.z-dn.net/?f=x%3DN_A%5Ctimes%20n)
![n=\frac{N_A}{x}=\frac{1.01\times 10^{24}}{6.022\times 10^{23} mol^{-1}}](https://tex.z-dn.net/?f=n%3D%5Cfrac%7BN_A%7D%7Bx%7D%3D%5Cfrac%7B1.01%5Ctimes%2010%5E%7B24%7D%7D%7B6.022%5Ctimes%2010%5E%7B23%7D%20mol%5E%7B-1%7D%7D)
n = 1.6771 moles
Mass of 1.6771 moles of given compound:
![1.6771 mo\times (3\times 12 g/mol+8\times 1 g/mol)=73.7960 g](https://tex.z-dn.net/?f=1.6771%20mo%5Ctimes%20%283%5Ctimes%2012%20g%2Fmol%2B8%5Ctimes%201%20g%2Fmol%29%3D73.7960%20g)
73.7960 grams is the total mass of the sample.