Calculate the empirical formula for the following compound: potassium tartrate found in baking powder: 20.8% K, 2.7% H, 25.5% C, and 51.0% O

Answer 1

Take a 100 g sample. That will give you
20.8 g K
2.7 g H
25.5 g C
51.0 g O
Convert each to moles.
Then find the ratio of the elements to each other with the smallest number being 1.00. The easy way to do that is to divide the smallest number by itself and divide all of the other numbers by the same small number. Finally, round to whole numbers. However, check your numbers and what they are percentages of because SOMETHING is wrong here.