how do you balance chemical equations?

Question

how do you balance N2(g) + H2(g) ---> NH3(g)

Answer 1

To balance the chemical equation you want to make sure you have the same amount of each element on each side. A guess and check method could be used.

See how you have 3 H's on the right side and only to on the left? This means you will have to at least double the NH3. To make them even. Try this and we get

N2 + H2 -> 2NH3

Now we have have to balance the hydrogen on the other side. So we would triple the hydrogen to make it so we have six hydrogens on each side leaving us with

N2 + 3H2 -> 2NH3

Since there are two nitrogens on each side and 6 oxygens on each side, the chemical equation is now balanced

Answer 2

There are two N's on the left in N2, so you write a 2 in front for the NH3 on the right:

N2 + H2 ===> 2NH3

Next, there are now 6 H's on the right, so you write a 3 in front of the H2 on the left:

N2 + 3H2 ===> 2NH3

Answer 3

ok set up a chart of how many of each element you have on each side
so
L R
2 N 1 N
2 H 3 H

then its just a matter of playing with the numbers
so since you need to make the right side have 2 N put a 2 infront of the NH3

So the chart looks like this
L R
2 N 2 N
2 H 6 H

Now you need to get 6 H on the left side. Put a 3 in front of the H2

So the equation is N2 + 3H2 ---> 2NH3

Answer 4

3 H2 and 2 NH3
one N2
That's the Haber process for you......

Answer 5

N2 (g) + 3 H2(g) ---> 2NH3(g)