chemistry

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Given the following reaction:
4 KO2 + 2 H2O + 4 CO2 4 KHCO3 + 3 O2
How many moles of H2O are needed to react with 12.15 moles of CO2? moles

A chemical reaction occurs between solutions of LiCl and silver nitrate. This reaction produces a precipitate that is recovered, dried and massed. The mass of the precipitate is found to be 14.391074. What is the percent yield of the reaction if 11.4453 grams of LiCl was reacted with excess silver nitrate?

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