How many atoms in each element?
5CH3CO2H
C:
H:
O:
4(NH2)2CO
N:
H:
C:
O:
4C3H5(OH)3
C:
H:
O:
5CH3CO2H
C:
H:
O:
4(NH2)2CO
N:
H:
C:
O:
4C3H5(OH)3
C:
H:
O:
1 Answer
Explanation:
When determining how many atoms of an element are in a compound from the chemical formula, we need to keep in mind two things:
- The subscript, which is where the
#x# is in#A_x# . This tells us how many atoms of that specific element or group are in the compound.
So, for example, in#H_2O# , there are#2# hydrogen atoms.
In#Be(NO_3)_2# , there are#2# #NO_3^-# ions. It also means that there's#2xx3=6# atoms of oxygen. - The coefficient, which is where the
#x# is in#xA# . When we put a coefficient in front of something, we're multiplying the entire thing by that number.
For example, in#2CO_2# , there are#2# #CO_2# molecules. It also means that there's#2xx2=4# atoms of oxygen.
Let's get on with the questions! :)