Question

For the expression 2C2H4 (g). What mass of ethene is represented?

Answer 1

Are you sure that's all the question said? I couldn't tell you the mass from just the molecular formula but I can tell you it's molar mass. There are 4carbon with a molar mass of 12.011 grams per mole each and 8 hydrogens with a molar mass of 1.008g per mole each. Theses can be found on a periodic table. So you have a total of 56.104 grams per mole.

Answer 2

ok thnxx

Answer 3

No problem