Please help me to solve this problem(give me some hints). Thank you so much!

 

A sample of cocaine, C7H21O4N, is diluted with sugar, C12H22O11.

When a 1.00mg sample of this mixture is burned, 1.00mL of carbon dioxide(d=1.80g/L) is formed.

What is the percentage of cocaine in this mixture?

You didn't say but I assume the combustion takes place in an adequate supply of oxygen.

 

You need to write balanced equations for the combustion of cocaine and sugar and combine the two equations into a single one, using the proportion of cocaine = X and the proportion of sugar = (1-X)

 

Have you done this?

Edited October 17, 201510 yr by studiot

Thank you, I will try it out.