If 16.9 g sodium carbonate is obtained from the thermal decomposition of 75.0 g of sodium hydrogen carbonate according to the unbalanced equation,

Question

NaHCO3 �¨ Na2CO3 + H2O + CO2
What is the percent yield?

Answer 1

Here is a worked example of a stoichiometry problem INCLUDING percent yield.
http://www.jiskha.com/science/chemistry/stoichiometry.html

Answer 2

good

Answer 3

excellent