How many moles of Hydrogen gas must be used to make 0.75 mol of NH3?
N2+3H2 --->2NH3 *

1.125 moles of hydrogen are needed.

Explanation:

Given data:

Number of moles of ammonia formed = 0.75 mol

Number of moles of hydrogen needed = ?

Solution:

Chemical equation:

N₂  + 3H₂      →       2NH₃

Now we will compare the moles of ammonia and hydrogen.

                  NH₃         :           H₂  

                    2           :             3

                 0.75         :           3/2×0.75 = 1.125 mol

1.125 moles of hydrogen are needed.

the answer is d.) potassium

c

explanation: