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A mixture of NH3(g) and N2H4(g) is placed in a sealed container at 300 K. The total pressure is 0.5 atm. The container is heated to 1200 K at which time both substances decompose completely according to the equations
After decomposition is complete, the total pressure at 1200 K is found to be 4.5 atm. Find the mole % of N2H4 in the original mixture:
  • a)
    20%
  • b)
    25%
  • c)
    50%
  • d)
    75%
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
A mixture of NH3(g) and N2H4(g) is placed in a sealed container at 300...
Assume first n1 and n2 be the initial moles of the two compunds,

Hence initially total moles = n1+n2

and from ideal gas eqn. we get,

0.5*V = (n1+n2)*R*300--(I)

after decmposition,

from 2 moles of NH3 we get total 4 moles
So from 1mole of NH3 we get total 2 moles

and from 1 moles of N2H4 we get 3 moles total.

Hence the total moles for mixture => 2n1 + 3n2

Anf from the ideal gas eqn. we get,

4.5*V = (2n1 + 3n2)*R*1200--(II)

Dividing both the eqns. (I)÷(II) we get,

n1 = 3 and n2 = 1

Percentage of N2H4 therfore is => 1*100/4 = 25%

and % of  NH3 => 75%
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A mixture of NH3(g) and N2H4(g) is placed in a sealed container at 300 K. The total pressure is 0.5 atm. The container is heated to 1200 K at which time both substances decompose completely according to the equationsAfter decomposition is complete, the total pressure at 1200 K is found to be 4.5 atm. Find the mole % of N2H4 in the original mixture:a)20%b)25%c)50%d)75%Correct answer is option 'B'. Can you explain this answer?
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A mixture of NH3(g) and N2H4(g) is placed in a sealed container at 300 K. The total pressure is 0.5 atm. The container is heated to 1200 K at which time both substances decompose completely according to the equationsAfter decomposition is complete, the total pressure at 1200 K is found to be 4.5 atm. Find the mole % of N2H4 in the original mixture:a)20%b)25%c)50%d)75%Correct answer is option 'B'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about A mixture of NH3(g) and N2H4(g) is placed in a sealed container at 300 K. The total pressure is 0.5 atm. The container is heated to 1200 K at which time both substances decompose completely according to the equationsAfter decomposition is complete, the total pressure at 1200 K is found to be 4.5 atm. Find the mole % of N2H4 in the original mixture:a)20%b)25%c)50%d)75%Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A mixture of NH3(g) and N2H4(g) is placed in a sealed container at 300 K. The total pressure is 0.5 atm. The container is heated to 1200 K at which time both substances decompose completely according to the equationsAfter decomposition is complete, the total pressure at 1200 K is found to be 4.5 atm. Find the mole % of N2H4 in the original mixture:a)20%b)25%c)50%d)75%Correct answer is option 'B'. Can you explain this answer?.
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