Question

H2 + O2  H2O, What are the coefficients used to balance?
A. 0,2,2
B. 2,2,2
C. 2,0,2
D. 2,1,2

Answer 1

Answer:

D

Explanation:

2H2 + O2 ------->2H2O

Answer 2

Answer:

The coefficients used to balance the given equation are 2, 1, 2.

Therefore, option (D) is correct.

Explanation:

The given chemical equation is;:

H₂   +  O₂   $\longrightarrow$  H₂O

In the above equation hydrogens are already balanced. To balance oxygen multiple water with 2. So, equation becomes:-

H₂   +  O₂   $\longrightarrow$  2 H₂O

Now, oxygens are balanced but the hydrogens became unbalanced. To balance hydrogen, multiple the hydrogen by 2 on left side.

2 H₂   +  O₂   $\longrightarrow$  2H₂O

The above equation is the balanced chemical equation in which the number of oxygen and hydrogen are equal on both sides of the arrow.

Therefore, the coefficient of H₂ is 2,  the coefficient of O₂ is 1 and  the coefficient of H₂O is 2.

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