1. CaCO3 (Ca +2, C +4, O -2)
2. Na2SO3 (Na +1, S +6, O -2)
3. HNO3 (H +1, N +5, O -2)
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Answers & Comments
1. CaCO3 (Ca +2, C +4, O -2)
2. Na2SO3 (Na +1, S +6, O -2)
3. HNO3 (H +1, N +5, O -2)