Water can be formed in the following reaction: 2h2 + o2 —> 2h2o

if you have 7 moles of hydrogen gas (h2), how many moles of water can you form? (assume you have excessive amount of oxygen gas)

7 moles

Explanation:

Given data:

Moles of hydrogen = 7 mol

Moles of water formed = ?

Solution:

Chemical equation:

2H₂ + O₂ → 2H₂O

Now we will compare the moles of water with hydrogen from balance chemical equation:

              H₂          :        H₂O

                2          :           2

                7          :           7

So in the presence of excess oxygen and 7 moles of hydrogen seven number of moles of water produced.

the answer is c. nacl