Question 8 • *26-27 CFISD TX-Chemistry A CR
Ammonium is the polyatomic ion NH₄⁺, and carbonate is CO₃²⁻. Two ammonium ions are needed to balance the 2− charge on one carbonate ion, giving (NH₄)₂CO₃. Therefore, choice C, (NH₄)₂CO₃, is correct.
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