BaSO4 has 4 oxygen atoms per mol BaSO4.
Ba(OH)2 has 2 oxygen atoms per mol Ba(OH)2.
Barium sulfate, BaSO4, is a white crystalline solid that is insoluble in water. It is used by doctors to diagnose problems with the digestive system. Barium hydroxide, Ba(OH)2, is also a white crystalline solid and is used in wastewater and treatment. How many more oxygen atoms are represented in the formula for barium sulfate than in the formula for barium hydroxide?
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