A mixture of NH3( g ) and N2H4( g ) is placed in a sealed container at 320K . Th

Question

A mixture of NH3(g) and N2H4(g) is placed in a sealed container at 320K . The total pressure is 0.47atm . The container is heated to 1200 K at which time both substances decompose completely according to the equations 2NH3(g)?N2(g)+3H2(g) ; N2H4(g)?N2(g)+2H2(g) . After decomposition is complete the total pressure at 1200 K is found to be 4.5 atm.

Find the percent (by volume) of N2H4(g) in the original mixture. (Assume two significant figures for the temperature.)

Express your answer using two significant figures.

Explanation / Answer

use the mass conservation principle

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