Final answer:
The empirical formula of the compound composed of 37.3g of potassium and 7.63g of oxygen is K2O.
Step-by-step explanation:
To determine the empirical formula of a compound, we need to find the ratio of atoms present in the compound. First, we need to find the moles of each element by dividing the given masses by their respective atomic masses. The molar mass of potassium (K) is 39 g/mol and the molar mass of oxygen (O) is 16 g/mol. Based on the calculations, the ratio of K to O is approximately 2:1. Therefore, the empirical formula of the compound is K2O.