from the molecular formula of CH₄ , we see that
one molecule of CH₄ contains 1 atom of carbon and 4 atoms of hydrogen .
in the same way , if we have 1 mole of CH₄ , it will contain 1 mole of carbon and 4 moles of hydrogen
similarly , if we have 5 moles of CH₄ , it will contain 5 x 1 mole of carbon and 4 x 5 moles of hydrogen
so in 5 moles of CH₄ , we have 5 moles of carbon