Question

How much mass does 7.53 x 1022 molecules of CH4 represent?

Answer 1

1 mole of any substance has 6.02 x 10²³ molecules. So, first of all we must find the number of moles of CH₄: 0.753 x 10²³/6.02 x 10²³= 0.1254 moles. Then the mass will be 0.125 moles * 16 g/mole = 2 g