Question

How do we balance a chemical equation

Answer 1

well, it depends upon how attentive you are in class but the answer is:

Firstly, count the atoms of seperate elements in reactants side.

Then, try to multiply the atoms by writing the respective number in front of the molecules in the product side

Hope this answer helps u........

Answer 2

count the no. of atoms on both side for example
H2+O2=H2o
H=2 H=2
O=2 O=1

here hydrogen is balanced but oxygen is not.
if I multiply by 2
on product side=H=4,O=2
now my oxygen is balanced but hydrogen is not .
so I will multiply ONLY hydrogen on reactive side.
therefore ,
on reactive side =H=4,O=2

we can see that both the sides are balanced.
final equation:-
2H2+O2---->2H2O

thank you,
helper