Question

How many moles of N are in 31 g N2H4? Enter your answer to 1 decimal place.

Answer 1

Step-by-step 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