How many grams are there in 9.40 x 10^25 molecules of H2? with prove so i could understand how you got it. if you can thank you

Convert amount of molecules into moles using Avogadro’s number

9.40 x 10^25 molecules H2 x 1 mole / 6.02 x 10^23 molecules

= 156 moles H2

Convert moles of H2 into grams using H2’s molar mass (1.01 x 2 = 2.02)

156 mol H2 x 2.02 g / 1 mol
= 315 g H2