Answer :
The empirical formula of the compound is K2O. The empirical formula of a compound composed of 36.9 g of potassium (K) and 7.55 g of oxygen (O) is K2O. The empirical formula of a compound is the simplest whole number ratio of atoms of each element present in a compound.
Here, we are given the masses of potassium and oxygen.
We can convert these masses to moles using their respective molar masses:
Moles of K = 36.9 g / 39.10 g/mol (molar mass of K) = 0.944 mol
Moles of O = 7.55 g / 15.999 g/mol (molar mass of O) = 0.472 mol
The ratio of K to O in this compound can be determined by dividing the number of moles of each element by the smallest number of moles (in this case, O):
[tex]K: 0.944 mol / 0.472 mol[/tex]
= 2O: 0.472 mol / 0.472 mol
= 1
Therefore, the empirical formula of the compound is K2O.
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