What sequence of coefficients will balance the following equation? #Ca(s) + O_2(g) -> 2CaO(s)#
You place a 2 in front of the
A reaction needs to be balanced in order to fulfil the Law of conservation of mass. Therefore at both sides of the reaction arrow (
Your reaction is
The first step to do, is to look how many atoms are on both sides of the arrow.
To balance the reaction, we must have on the left side 2
You can see, that we now have 2 atoms of each element at the left and right side of the arrow. Therefore the reaction is balanced!
By balancing reactions, you should only set the numbers in front of the molecules (like 2 Ca),
and thus not change the molecules (like