Question

How many atoms of C are in 7.7x10^24 molecules of CH8

Answer 1

divide by Avogadro's number to convert to moles, as it is the ratio of molecules (or atoms depending on if you are dealing with a molecule or not) per 1 mole of substance.

Avogardro's number has units of 1/mol

6.02214129*10^(23) 1/mol)

Use gravimetric factor to convert from CH8 to moles of C, and multiply by avagardro's number

I'm pretty sure you can just skip using Avogadro's number, and just use gravimetric factor directly

The formula for Gravimetric factoring being

\[(\frac{Molecular Mass of C}{Molecular Mass of CH_8}) (Moles of CH8)\]