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N2+3H2 → 2NH3

a. How many grams of NH3 would be produced from 10.4 g of N2

b. How many grams of H2 would be needed to completely react with 10.4 g of N2?

User Mattdaspy
by
8.5k points

1 Answer

3 votes

Answer: 4 moles of ammonia.

Step-by-step explanation:

So you’re trying to make NH 3

from N 2

and H 2

.

In chemistry, that is denoted by the following reaction:

N 2

+ H 2

→ NH 3

But you can’t create or destroy atoms, so you need to have the same number of both of them on the same side.

You have 2 hydrogen atoms on the left and 3 on the right. How can we make both amounts the same? If we try to make 2 NH 3

molecules instead of 1, we have 6 hydrogen atoms in total. 6/2 =3 H 2

. This also means we have 2 nitrogen atoms, so we have balanced the equation.

N 2

+ 3 H 2

→ 2 NH 3

Now comes the fun part. Those numbers in front of the different formulas are the amount of moles that go into the equation. You need 1 mole of nitrogen and 3 moles of hydrogen to make 2 moles of ammonia. If we multiply these numbers by 2, we can also say you need 2 moles of nitrogen and 6 moles of hydrogen to make 4 moles of ammonia. (And you’d have 1 mole of nitrogen left over.)

User Tipu Sultan
by
8.1k points
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