- Potassium (K): \( 39.10 \, \text{g/mol} \times 2 = 78.20 \, \text{g/mol} \)
- Chromium (Cr): \( 51.996 \, \text{g/mol} \times 2 = 103.992 \, \text{g/mol} \)
- Oxygen (O): \( 16.00 \, \text{g/mol} \times 7 = 112.00 \, \text{g/mol} \)
- Total molar mass = \( 78.20
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