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What is the coefficient of oxygen in the following equation for the reaction of potassium (K) with oxygen (O2) to form potassium oxide (K2O?

__ K + ___ O2 -> ___ K2O

is it 4, 3, 2, or 1?

3 answers

4K + O2 ==> 2K2O

So would that be a 1 for the coefficient?

A 1 is understood when no other coefficient is there.

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