Question

How do I balance the chemical equation Ca(s) +O2(g) =CaO(s)

Answer 1

2Ca(s) + O2(g) = 2CaO(s)

Step-by-step explanation:

2 moles of calcium reacts with 1 mole of oxygen gas to yield 2 moles of calcium oxide.

Thus, the reaction shows the formation of calcium oxide when calcium metal burns in the presence of oxygen. This is also the laboratory preparation of calcium oxide from calcium and oxygen.

Answer 2

Hey there!

Ca + O₂ → CaO

Balance O.

2 on the left, 1 on the right. Add a coefficient of 2 in front of CaO.

Ca + O₂ → 2CaO

Balance Ca.

1 on the left, 2 on the right. Add a coefficient of 2 in front of Ca.

2Ca + O₂ → 2CaO

Our final balanced equation: 2Ca + O₂ → 2CaO

Hope this helps!