calculations based on chemical equations

The reaction between potassium superoxide, KO2, and CO2,

4KO2 + 2CO2 ——- 2K2CO3 + 3O2

is used as a source of O2 and absorber of CO2 in self -contained breathing equipment used by rescue workers.

a) How many moles of O2 are produced when 0.400 mol of KO2 react in this fashion?

b) How many grams of KO2 are needed to form 7.50g of O2?


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