A post 1982 penny is made of a zinc core with a thin copper coating. A penny with the zinc core exposed and a mass of 2.5 grams was placed in hydrochloric acid over night. The mass of the remaining metal was 0.1 grams.
a. Can zinc replace hydrogen in HCl ?
b. Can copper replace hydrogen in HCl ?
c. What was the mass of zinc in the penny? Zn = g
d. What was the mass of copper? Cu = g

If the accepted value for the mass of zinc in a penny is 2.4375 grams, what was the percent error, ? Percent error = ____________ 2 sig figs.

Question

A post 1982 penny is made of a zinc core with a thin copper coating. A penny with the zinc core exposed and a mass of 2.5 grams was placed in hydrochloric acid over night. The mass of the remaining metal was 0.1 grams. 
a. Can zinc replace hydrogen in HCl         ?  
b. Can copper replace hydrogen in HCl        ?  
c. What was the mass of zinc in the penny? Zn =    g 
d. What was the mass of copper? Cu =         g 

If the accepted value for the mass of zinc in a penny is 2.4375 grams, what was the percent error, ? Percent error =  ____________  2 sig figs.

aaronq · Answer

yes, no, mass of zinc ... 2.5 -0.1 =X  grams

mass of copper.. 0.1 grams