Hydrogen gas reacts with oxygen to form liquid water. Write a balanced chemical equation for this reaction

2H2 + O2 —> 2H2O

Explanation:

The equation for the reaction between H2 and O2 to produce liquid water is illustrated below:

H2 + O2 —> H2O

Next, we need to balance the equation. This can be achieved by doing the following:

There are 2 atoms of oxygen on the left side and 1 atom on the right side. It can be balanced by putting 2 in front of H2O as shown below:

H2 + O2 —> 2H2O

There are a total of 4 atoms of Hydrogen on the right side and 2 atoms on the left. It can be balanced by putting 2 in front of H2 as shown below:

2H2 + O2 —> 2H2O

Now we can see that the equation is balanced as we have the same number of atoms of Hydrogen and oxygen on both sides of the equation

the answer is option a.