Answer: [tex]TiO_2[/tex] has higher percentage of oxygen by mass.
Explanation:
To calculate the mass percent of element in a given compound, we use the formula:
[tex]\text{Mass percent of oxygen}=\frac{\text{Mass of oxygen}}{\text{mass of compound}}\times 100[/tex]
1. Mass of oxygen in [tex]TiO_2[/tex] = [tex]\frac{32g}{80g}\times 100=40\%[/tex]
2. Mass of oxygen in [tex]ZnO[/tex] = [tex]\frac{16g}{81g}\times 100=19.8\%[/tex]
Thus [tex]TiO_2[/tex] has higher percentage of oxygen by mass.
The compound with the higher percentage of oxygen by mass is titanium dioxide.
Titanium dioxide, TiO2, has a molar mass of 79.866 g/mol and O2 has a molar mass of 32.
Percentage by weight of oxygen in TiO2 = 32/79.866 x 100
= 40.07%
Zinc oxide, ZnO, has a molar mass of 81.38 g/mol
percentage by weight of oxygen in ZnO = 16/81.38 x 100
= 19.66%
Thus, titanium dioxide has a higher percentage by weight of oxygen than zinc oxide.
More on percentage by mass of substances can be found here: https://brainly.com/question/17592380?referrer=searchResults
