Problem: Which of the following formulas is incorrect?1. K2O            2. Al 2S3            3. MgO            4. BaF

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Problem Details

Which of the following formulas is incorrect?

1. K2O            

2. Al 2S3            

3. MgO            

4. BaF

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Based on our data, we think this problem is relevant for Professor Cook's class at LSU.