Question

a hydrocarbon contains 85.7% carbon if 42 mg of the compound contains 3.01 into 10 raise to 20 molecules find the molecular formula of the compound

Answer 1

Hello! Let me try to answer this :)

First, assume the hydrocarbon is CxHy. Find the Mr, so that we can find the value of x. With Mr and x, we can find the value of y. So the molecular formula of the hydricarbon compund is C6H12.

Remember some formulas:
n = m/Mr
molecules = n x 6.02 x 10^23

Mr = molecular mass
Ar = atomic mass. Ar C = 12, Ar H = 1

Thanks and please correct if there are any mistakes ^ ^

Answer 2

Answer:question is very boring

Explanation: