What percentage does oxygen make up in the compound #MgSO_4#?
Oxygen makes up
In order to compute the mass percent of oxygen in
The formula mass of
The atomic mass of the oxygen atom is
Now, we have to use the following equation:
The numerator represents the mass of the desired atom, which is O in our case, and the denominator represents the mass of the entire compound. You just divide the two and multiply by 100 to obtain the percent composition:
I multiplied the atomic mass of oxygen by 4 because you have to account for all of the oxygen atoms in the formula.