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Sodium carbonate reacts with nitric acid according to the following equation:

Na2CO3+2HNO3-->2NaNO3+CO2+H2O
a. how many moles of Na2CO3 are required to produce 100.0 g of NaNO3?
b. if 7.50g of Na2CO3 reacts, how many moles of CO2 are produced?

2 answers

Here is a worked example of a stoichiometry problem.
http://www.jiskha.com/science/chemistry/stoichiometry.html
if 7.50g of Na2CO3 reacts, how many moles of CO2 are produced?