posted by Kendra on .
Cinnamic alcohol is used mainly in perfurmery, particularly in soaps and cosmetics. Its molecular formula is C9H10O.
a. Calculate the percent composition by masss of C, H, and O in cinnamic alcohol.
b. How many molecules of cinnamic alchol are contained in a sample of mass 0.469 grams.
Please explain how to do this problem and provide the correct answers.
a) 45% C
(I'm not sure what is meant with mass but this should be the percentage of how much of each element is present in the molecule...)
b) since molecular formula of cinnamic acid is C9H10O, its molecular mass is (9x12)+10+16 = 134.
This is the amount of g per mol.
So 0.469g has 0.035 mol.
Jazz. Can you give show me how to solve for cinnamic alcohol and not acid?