Answer
There are 9.02 moles of $CH_4$ in 144.36 grams of $CH_4$.
Work Step by Step
A carbon atom consists of 6 protons and 6 neutrons.
A hydrogen atom consists of 1 proton.
The mass of one methane $CH_4$ molecule is $16~u$
We know that 1 mole of methane has a mass of $16~g$. We can find the number of moles in $144.36~g$ of methane:
$\frac{144.36~g}{16~g/mol} = 9.02~mol$
There are 9.02 moles of $CH_4$ in 144.36 grams of $CH_4$.
