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Sagot :

Answer:

2H₂ + O₂ —> 2H₂O

The coefficients are: 2, 1, 2

Explanation:

__ H₂ + __ O₂ —> __ H₂O

The above equation can be balance as illustrated below:

H₂ + O₂ —> H₂O

There are 2 atoms of O on the left side and 1 atom on the right side. It can be balance by writing 2 before H₂O as shown below:

H₂ + O₂ —> 2H₂O

There are 2 atoms of H on the left side and 4 atoms on the right side. It can be balance by writing 2 before H₂ as shown below:

2H₂ + O₂ —> 2H₂O

Now, the equation is balanced and the coefficients are: 2, 1, 2