Mole ConceptHard
Question
A definite volume of ammonia gas is passed through a series of electric sparks by which the volume becomes 90 ml. On washing with dilute orthophosphoric acid, the volume is reduced to 84 ml. Which of the following statement(s) is/are correct regarding the original ammonia sample?
Options
A.Its original volume was 45 ml
B.Its original volume was 48 ml
C.12.5% of the original ammonia has decomposed
D.87.5% of the original ammonia has decomposed
Solution
Volume of undecomposed NH3 = 90 – 84 = 6 mL
2NH3 → N2 + 3H2
Hence, initial volume of NH3 = 42 + 6 = 48 mL
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