Question

Calcium reacts with the oxygen in the air, forming calcium oxide. write the balanced chemical equation for this reaction. what is the sum of the coefficients?

Answer 1

Step-by-step explanation:

When calcium is chemically combining with oxygen then it results into the formation of chemical compound called calcium oxide.

The chemical reaction equation for this reaction is as follows.

`Ca + O_(2) \rightarrow CaO`

As there are not equal number of atoms on both reactant and product side. Therefore, the balanced equation will be as follows.

`2Ca + O_(2) \rightarrow 2CaO`

It is known that numbers present before the elements or compounds in a reaction equation are known as coefficients.

Therefore, sum of the coefficients in this equation is 2 + 1 + 2 = 5.

Answer 2

calcium react with oxygen to form calcium oxide that is quicklime or burnt lime which is white at room temperature
The balanced chemical equation is
2Ca(s) + O2(g) --->2CaO(S) - a white solid at room temperature
2 moles of Ca reacted with 1 mole of O2 while to form 2 moles of CaO
hence the sum coefficient = 2+1+2=5