find the molecular formula of compound having percentage composition C is equal to 49 point 48% h is equal to 5.19 percent is equal to 16 point 48% and n is equal to 28.35 percent molecular mass of compound is is 194
Answers
STEP BT STEP EXPLANATION :
The basic equation = mass of element / mass of compound X 100%
For instance, if you had a 80.0 g sample of a compound that was 20.0 g element X and 60.0 g element y then the percent composition of each element would be:
Element X = 20.0 g X / 80.0 g total x 100% = .250 or 25.0 %
Element Y = 60.0 g Y / 80.0 g total x 100 % = .750 or 75.0 %
Here is an example for the compound C2HO4
You will first need to find the molar mass of the compound.
C = 2 x 12 = 24
O = 1 x 16 = 16
H = 4 x 1 = 4
Total mass = 40 amu
To find the percent composition you divide each part by the whole and multiply by 100 to convert to a %.
C = (24/44) x 100 = 54.5%
O = (16/44) x 100 = 36.4%
H = (4/44) x 100 = 9.1%
Percent composition can also be calculated using experimental data.