Asked by ruth

Which equation is the balanced equation for Ca + O2→CaO?

Responses

2Ca + O2→2CaO
2 uppercase C lowercase a plus uppercase O subscript 2 end subscript rightwards arrow 2 uppercase C lowercase a uppercase O

2Ca + 2O2→2CaO
2 uppercase C lowercase a plus 2 uppercase O subscript 2 end subscript rightwards arrow 2 uppercase C lowercase a uppercase O

Ca + O2→CaO
uppercase C lowercase a plus uppercase O subscript 2 end subscript rightwards arrow uppercase C lowercase a uppercase O

4Ca + 2O2→2CaO
4 uppercase C lowercase a plus 2 uppercase O subscript 2 end subscript rightwards arrow 2 uppercase C lowercase a uppercase O

All Answers 1

Answered by GPT-5 mini AI
The balanced equation is:

2Ca + O2 → 2CaO

Explanation: Putting a coefficient 2 before Ca and CaO gives 2 Ca atoms and 2 O atoms on both sides. The other options either leave oxygen unbalanced or change atom counts incorrectly.