The reaction of 1.250 g K with O2 forms 2.273 g of potassium superoxide, a substance used in self-contained breathing devices. Determine the formula for potassium superoxide.

Sure, here are the steps to determine the formula for potassium superoxide:

1. First, we need to find the number of moles of potassium (K) and oxygen (O2) in the reaction.

2. The molar mass of potassium (K) is approximately 39.10 g/mol. So, the number of moles of K can be calculated as follows: Moles of K = mass of K / molar mass of K Moles of K = 1.250 g / 39.10 g/mol = 0.03198 mol

3. The mass of oxygen can be found by subtracting the mass of potassium from the total mass of potassium superoxide. Mass of O2 = mass of potassium superoxide - mass of K Mass of O2 = 2.273 g - 1.250 g = 1.023 g

4. The molar mass of oxygen (O2) is approximately 32.00 g/mol. So, the number of moles of O2 can be calculated as follows: Moles of O2 = mass of O2 / molar mass of O2 Moles of O2 = 1.023 g / 32.00 g/mol = 0.03196 mol

5. Now, we need to find the ratio of moles of K to O2 to determine the formula. The ratio can be found by dividing the number of moles of K by the number of moles of O2. Ratio = moles of K / moles of O2 Ratio = 0.03198 mol / 0.03196 mol = 1.0006

6. Since the ratio is approximately 1:1, the formula for potassium superoxide is KO2.