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Question

S   + 6 HNO3 → H2SO4 + 6 NO2 + 2 H2O

In the above equation, how many grams of water can be made when 4.4 moles of HNO3 are consumed?

Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:



Element	Molar Mass
Hydrogen	1
Nitrogen	14
Sulfur	32
Oxygen	16

Answer 1

From the balanced reaction, 2 moles of H₂O is formed for every 6 moles of HNO₃ that reacts. The mole ratio of H₂O to HNO₃ is 2:6. Use this ratio to setup your stoichiometry conversion.

4.4 mol HNO₃ x (2 mol H₂O / 6 mol HNO₃) = 1.5 mol H₂O

Convert mol H₂O of g of H₂O using its MW (18 g/mol).

1.5 mol H₂O x (18 g H₂O / 1 mol H₂O) = 27.0 g H₂O (rounded to the nearest tenth)