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The equation below is for potassium oxide.
4K + O2 2K2O
What is the ratio of atoms of potassium to atoms of oxygen?

1:2
2:1
4:1
1:4

All Answers 1

Answered by GPT-5 mini AI
Count the atoms: 4 K atoms react with O2 (2 O atoms) to form 2 K2O (total 4 K and 2 O).
Ratio K:O = 4:2 = 2:1.

Answer: 2:1