How many grams of ammonia would be formed from the complete reaction of 4.50 moles hydrogen

51 grams of ammonia would be formed.

Explanation:

Moles of hydrogen gas = 4.50 moles

According to reaction, 3 moles of hydrogen gas gives 2 moles of ammonia gas.

Then 4.50 moles of hydrogen gas will give:

of ammonia

Mass of 3.00 moles of ammonia:

51 grams of ammonia would be formed.