Question

balance the chemical equation ca+o2=2Cao​

Answer 1

Answer:

This is the balanced chemical equation:

2Ca + O2 ➡ 2CaO.

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Answer 2

Answer:

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Explanation:

Correct Question:  balance the chemical equation Ca + O2 = CaO

Consider a system where you have just one atom of ‘Ca’ and one molecule of ‘O2’. Let’s say they are to react in order to form the compound, CaO.

Here, after forming one molecule of CaO, ‘Ca’ is exhausted, but one atomic part of oxygen remains in the system, uncombined, which makes the system highly unstable.

So, this has to combine with another atom of ‘Ca’ to take the system to a stable state forming another molecule of ‘CaO’ resulting in 2 molecules of ‘CaO’ in the system.

So, at least 2 atoms of ‘Ca’ are needed for 1 molecule of ‘O2’ for the reaction to complete and the system to be stable.

=> Basically, 2 moles of Ca with 1 mole of O2 produces 2 moles of ‘CaO’.

=> 2Ca + O2 → 2CaO