The mass percent of oxygen in Nickel([tex]III[/tex])sulfate is [tex]23.68[/tex] percent.
At first, we look up the atomic masses for the element from the periodic table.
The atomic masses are found to be:
Next, we determine how many grams of each element are present in one mole of [tex]Ni_{2}(SO_{4})_{3}[/tex]
The mass of one mole [tex]Ni_{2}(SO_{4})_{3}[/tex] is:
[tex]117.4g+96g+192g=405.4g[/tex]
So, The mass percent of oxygen [tex]=(96g/405.4)*100=0.2368*100%\\[/tex]
[tex]=23.68 %[/tex] percent.
To learn more about Mass percent, refer to: