a laboratory has a 3.0 mol sample of pure carbon and a 3.0 mol sample of pure helium. how many more grams of carbon do they have than grams of helium?
answer choices:
the carbon sample would have the same mass as the helium sample.
the carbon sample would have two times the mass of the helium sample.
the carbon sample would have three times the mass of the helium sample.
the carbon sample would have six times the mass of the helium sample.