Question

2H2 + 1O2 →→ 2H2O
if you change the 2H2 to 3H2 molecules and balance the equation, which statement is correct?
Each oxygen molecule will combine with 2 hydrogen molecules with no leftover molecules.
The equation will produce three molecules of water.
The result of the equation will be the same.
It is not possible to produce water without leftover molecules.

Answer 1

ANSWER IS D: IT IS NOT POSSIBLE TO PRODUCE WATER WITHOUT LEFTOVER MOLECULES.

Explanation:

Answer 2

The correct answer to the question is: The equation will produce three molecules of water.

To know which option is correct, we shall replace 2H₂ in the equation below with 3H₂ and then balance it.

2H₂ + O₂ —> 2H₂O

Replacing 2H₂ with 3H₂, we have:

3H₂ + O₂ —> 2H₂O

There are 6 atoms H on the left side and 4 atoms on the right side, it can be balance by replacing the 2 in front of H₂O with 3 as shown below:

3H₂ + O₂ —> 3H₂O

There are 2 atoms of O on the left side and 3 atoms on the right. It can be balance by writing $\frac{3}{2}$ in front of O₂ as shown below:

3H₂ + $\frac{3}{2}$O₂ —> 3H₂O

Now, the equation is balanced.

From the balanced equation, we can see that we have 3 molecules of H₂O.

Therefore, the correct answer to the question is: The equation will produce three molecules of water.

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