How many molecules of ethylene C2H4 are contained in 30 g of it?

univerkov | December 18, 2020 | education

Let’s find the relative molecular weight of the substance. To do this, add up the relative atomic masses of the elements:
C = 12g / mol
H = 1g / mol
C2H4 = 2 * 12 + 4 * 1 = 24 + 4 = 28g / mol
30/28 = 1.07 molecules

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