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How many moles of ammonia are needed to react completely with 3 moles of phosphoric acid?
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GPT-5 mini
H3PO4 is triprotic, so each mole reacts with 3 moles NH3:
H3PO4 + 3 NH3 → (NH4)3PO4.
For 3 moles H3PO4 you need 3 × 3 = 9 moles NH3.
H3PO4 + 3 NH3 → (NH4)3PO4.
For 3 moles H3PO4 you need 3 × 3 = 9 moles NH3.
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