Question

What is the molecular formula of a compound that has a molecular mass of 81 and the empirical formula C2H3?

Answer 1

Oooo hi again. First, find the molecular mass of the empirical formula. Then, divide the real molecular mass by the empirical molecular mass. You should get a whole number.
Finally, multiply the subscipts of the empirical formula by this whole number to get the molecular formula. :)

Answer 2

When I tried it, I got C6H9

Answer 3

Lemme get my calculator again. x_x

Answer 4

Haha, Thanks I have a huge chem exam coming up and want to make sure im doing these right

Answer 5

you are correct again! Yay.

Answer 6

Thanks