Which one of the following is the correct molecular formula of ammonium carbonate if the valency of ammonium ion is (+1) and carbonate anion is (-2) ?

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Q: 10 (NDA-I/2022)

Which one of the following is the correct molecular formula of ammonium carbonate if the valency of ammonium ion is (+1) and carbonate anion is (-2) ?

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,32,39,32,21,11,7

keywords: 

{'ammonium carbonate': [0, 0, 0, 1], 'ammonium ion': [0, 0, 0, 1], 'molecular formula': [0, 0, 0, 1], 'carbonate anion': [0, 0, 0, 1], 'nh4c03': [0, 0, 0, 1], 'valency': [0, 0, 0, 1]}

The molecular formula of ammonium carbonate can be determined using the crisscross method of writing the formula.

The valency of ammonium ion is +1, which means it can combine with anions that have a valency of -1 or -2. The valency of carbonate anion is -2, which means it can combine with cations that have a valency of +2.

To balance the charges, we need two ammonium ions (+1) to combine with one carbonate anion (-2). Therefore, the molecular formula of ammonium carbonate is (NH4)2CO3.

So, the correct answer is "(NH4)2CO3."