In a certain chemical reaction, 2 solid Mg atoms bond with O2 gas to produce solid Mgo. Which of the following reaction equations correctly describes this reaction?
A) 2Mg (s) + O2(g) – Mgo (1)
O B) 2Mg (s) + O2 (g) – 2Mgo (s)
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C) Mg (s) + 202 (g) – Mgo (s)
D) Mg (g) + O2 (s)
-
2MgO (g)

Option B. 2Mg(s) + O2 (g) —> 2MgO (s)

Explanation:

From the question given above,

We were told that:

2 solid Mg atoms bond with O2 gas to produce solid MgO.

This can be represented by an equation as follow:

2Mg(s) + O2 (g) —> MgO (s)

Next, we shall balance the above equation as follow:

2Mg(s) + O2 (g) —> MgO (s)

There are 2 atoms of Mg on the left side and 1 atom on the right side. It can be balance by putting 2 in front of MgO as shown below:

2Mg(s) + O2 (g) —> 2MgO (s)

Now, the equation is balanced.

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