If O2 is 0.5 g how much is K2O2?

Chemistry
Tutor: None Selected Time limit: 1 Day

If mass of oxygen is 0.5 g, how much product K2O2 is formed? What is the reaction?

Jan 5th, 2015

Balanced Reaction is:

2K + O2 ---> K2O2

As you can see: 1 mole of O2  produces 1 mole of K2O2

Molecular weight of O2 is 32 g/mol

Molecular weight of K2O2 is 110 g/mol

First, translate mass of O2 into moles : mole O2 = 0.5 g  /  32 g/mol = 0.0156 mol

Second, translate given moles into mass of K2O2 (O2 ratio to K2O2 = 1:1)

M K2O2 = o.oo92 mol x 110 g/mol = 1.72 g


Jan 5th, 2015

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