Question: how many molecules are there in 21.6 grams of ch4?
Answer: 4) How many grams does 5.60 x 1022 molecules of SiO2 weigh? (1x28,09)+( 2x 16.00) = 60.09 How many molecules are there in 21.6 grams of CH4? 23 2160, Imole x 6.02 x = 8.