Question

What is the empirical formula for a compound which contains 80.2% zinc and the rest is oxygen

Answer 1

The empirical formula for a compound : ZnO

Further explanation

The empirical formula is the smallest comparison of atoms of compound =mole ratio of the components

The principle of determining empirical formula

Determine the mass ratio of the constituent elements of the compound.

Determine the mole ratio by by dividing the percentage by the atomic mass

Percentage Oxygen :

100\%-80.2%=19.8\%

mol ratio for Zn : O =

`\tt (80.2)/(65.38)/ (19.8)/(16)\\\\1.227/ 1.238\rightarrow divide~by~smallest(1.227)\\\\1/ 1`