Calculate the percent composition of potassium in a compound...

Question Analysis
This question evaluates the student's ability to calculate the percent composition of an element in a compound using the given atomic masses and the formula for percent composition.

Key Concept Explanation
Percent composition is calculated by dividing the total mass of a specific element in one mole of the compound by the molar mass of the compound, then multiplying by 100%.

Step-by-step Solution
1. Determine the molar mass of :
Molar mass of K = 39.1 g/mol
Molar mass of Cr = 52.0 g/mol
Molar mass of O = 16.0 g/mol
Molar mass of

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