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Which of the following is not a polyatomic ion? A. NO3 − B. CaCO3 C. C2H3O2− D. C6H5COO−
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Which of the following is not a polyatomic ion? A. NO3 − B. CaCO3 C. C2H3O2− D. C6H5COO−

User Brianxautumn
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B. CaCO3 is the answer
User Yevgeny Simkin
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B. Polyatomic ions always have a charge. B doesn't have a charge thus it isn't a polyatomic ion
User Jacek Sztandera
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