s + HNO₃ - H₂S04+ H₂O + NO₂
Balance
Answers
Answer:
There is no fixed method actually. You have to take a random number as the number of molecules for
N
H
3
, then calculate result.
As for here, I have taken
4
as the number of molecules of
N
H
3
. That means
4
nitrogen atoms and
12
hydrogen atoms are taking part in this reaction.
Now, hydrogen atoms are present only in
H
2
O
as a product in this reaction. So that makes
6
molecules of
H
2
O
(as there are
12
hydrogen atoms).
Now, when we calculated the number of molecules of
H
2
O
, we also got the number of oxygen atoms present there.
On the other hand, as there are
4
molecules of
N
H
3
, there has to be
4
molecules of
N
O
2
as well to balance the number of nitrogen atoms in both side of the reaction.
That makes
8
another atoms of oxygen.
So now the total number of oxygen atoms is
(
8
+
6
)
or
14
, which means
14
atoms or
7
molecules of oxygen.