How many grams of H2 gas are needed to produce 85.2g of NH3
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Class 11
>>Chemistry
>>Some Basic Concepts of Chemistry
>>Stoichiometry and Stoichiometric Calculations
>>According to the reaction 3H2 + N2 → 2NH
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According to the reaction 3H
2
+N
2
→2NH
3
, how many grams of hydrogen gas and nitrogen gas are needed to make exactly 68 grams of ammonia?
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Solution
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Correct option is C)
The molar mass of ammonia is 17 g/mol.
68 grams of ammonia corresponds to
17g/mol
68g
=4moles
4 moles of ammonia will be obtained from
2
4×1
=2 moles of nitrogen and
2
4×3
=6 moles of hydrogen.
The molar masses of nitrogen and hydrogen are 28 g/mol and 2 g/mol respectively.
2 moles of nitrogen corresponds to 2×28=56 grams.
6 moles of hydrogen corresponds to 6×2=12 grams.