A reactor is supplied with 6 moles of N2 and 9 moles of H2, if 3 moles of NH3 is produced, how many moles of H2 are left at the end?(a) 1.5(b) 3(c) 4.5(d) 6I have been asked this question in examination.The query is from Species Material Balances in section The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units of Basic Chemical Engineering

A reactor is supplied with 6 moles of N2 and 9 moles of H2, if 3 moles

1.	A reactor is supplied with 6 moles of N2 and 9 moles of H2, if 3 moles of NH3 is produced, how many moles of H2 are left at the end?(a) 1.5(b) 3(c) 4.5(d) 6I have been asked this question in examination.The query is from Species Material Balances in section The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units of Basic Chemical Engineering
Answer» The CORRECT option is (C) 4.5 Easy explanation: The REACTION is N2 + 3H2 -> 2NH3, => extent of reaction = (3 – 0)/2 = 1.5, => moles of H2 left = 9 – 1.5*3 = 4.5.

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