Pure silver metal can be made using the reaction shown above; Cu + 2AgNO3 --> Ag + Cu(NO3)2. How many grams of copper metal will be needed to use up 100g of AgNO3?

Question

A. 18.70g
B. 37.3g
C. 74.7g
D. 100g

Answer 1

Here is a solved example of a stoichiometry problem. Just follow the steps.
http://www.jiskha.com/science/chemistry/stoichiometry.html