Answer: 1.648 moles of ammonia will be required to produce 0.824 moles of nitrogen gas.
Step-by-step explanation:
According to reaction 1 mole of nitrogen gas is produced by 2 moles of ammonia.
Then, 0.824 moles of nitrogen gas will be produced by:
1.648 moles of ammonia will be required to produce 0.824 moles of nitrogen gas.