How can I calculate the mass percent of carbon, nitrogen and oxygen in acetamide, #C_2H_5NO#?
The mass percent of a molecule shows the amount each element contributes to the total molecular mass.
The first step in determining the mass percent of a given molecule is to determine each of the molecule component atoms' atomic mass. Since acetamine is composed of carbon, nitrogen, oxygen and hydrogen, we get
Each element's mass contribution is determined by multiplying the number of atoms of a certain element with its molar mass
Adding each element's contribution gives us the molecule's total atomic mass
The final step to determining the molecul's mass percent is to divide each elemnt's contribution by acetamide's molar mass and to multiply the result by 100%
Mass percent of Carbon =
Mass percent of Nitrogen =
Mass percent of Oxygen =
Mass percent of Hydrogen =
Always check the validity of the answer by adding up all the percentages
So, acetamide is 40.7% Carbon, 23.7% Nitrogen, 27.1% Oxygen, and 8.5% Hydrogen...