Friday
November 28, 2014

Homework Help: AP CHEMISTRY

Posted by Kris on Thursday, August 1, 2013 at 5:18pm.

Commercial brass, an alloy of Zn and Cu, reacts with hydrochloric acid as follows.
Zn(s) + 2 HCl(aq) ZnCl2(aq) + H2(g)
(Cu does not react with HCl.) When 0.5093 g of a certain brass alloy is reacted with excess HCl, 0.0953 g ZnCl2 is eventually isolated.
(a) What is the composition of the brass by mass?
%Zn
%Cu

I have done this problem and got 32.42% Zn, 9.032% Zn, and 4.57% Zn and they were all wrong. I also got 35.15%Cu and that was wrong also.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

ap chemistry please BOB HELP ME - Can you guys give me a clue in how to approach...
Chemistry - Zinc reacts with hydrochloric acid according to the reaction ...
chemistry - Zinc reacts with hydrochloric acid according to the reaction ...
chemistry - Zinc metal reacts with hydrochloric acid (HCl) according to the ...
Chem - Zinc reacts with HCl to produce ZnCl2 and Hydrogen gas, H2. What volume, ...
Chemistry - Al(s) + HCl(aq) AlCl3(aq) + H2(g) Zn(s) + HCl(aq) ZnCl2(aq) + H2(g) ...
chemistry please help! - How many molecules of hydrogen are produced if 13.05 g...
chemistry please help!!!!!!!!!!!!!!!!!!!!!! - How many molecules of hydrogen are...
science - Al(s) + HCl(aq) AlCl3(aq) + H2(g) Zn(s) + HCl(aq) ZnCl2(aq) + H2(g) ...
chemistry!!! /10th grade - How many molecules of hydrogen are produced if 13.05 ...

Search
Members