Posted by Kyle on .
A 0.400 gram sample of white powder contains 0.141 of potassium, 0.115 grams of sulfur, and 0.144 grams of oxygen. what is the empirical formula?

Chemistry 
DrBob222,
1. Find the percent of each element.
2. Take a 100 g sample
3. Convert each sample into moles. moles = g/molar mass.
4. Determine the ratio of the elements to each other in whole numbers with the smallest being 1.00. If the numbers don't round to whole numbers, try multiplying each by 1, 2, 3, 4, etc until they can be rounded to whole numbers. 
chem 
answers,
i need them