Answer:
Explanation:
I usually just use approximate values for the elements on the periodic table. The reason for that is that everyone uses a different periodic table. Some are rounded others are more precise. Redo this problem with better numbers for the elements.
N = 14
H = 1
N2H4 = 2*14 + 4*1
N2H4 = 28 + 4 = 32
If you are given 31 grams of N2H4 then the formula is
mols = given mass / molecular mass
mols = 31 / 32
moles = 0.97
Now you have a problem . Is the answer 1.0 or is 0.9?
I think I would pick 1.0
