I just want to make sure I\'m doing this right and I\'m really stuckon doing par

Question

I just want to make sure I'm doing this right and I'm really stuckon doing part E, please help.

Dimethylhydrazine(CH3)2N2H2 is mixedwith dinitrogen tetroxide N2O4 to producegaseous nitrogen, carbon dioxide, and water vapor

a)Write the balanced chemical reaction
(CH3)2N2H2(l)+2N2O4(l)-->3N2(g)+2CO2(g)+4H2O(g)

b)What total pressure of gas would be produce at 100 celcius byreacting 7.00x105 kg of(CH3)2N2H2 and allowingit to expand to fill a volume of 6.4x106L?

(7.00x108g)x(1moL/60.109g)=1.16x107moL(CH3)2N2H2

[(1.16x107moL(CH3)2N2H2)x(0.0821)x(373K)]/(6.40x106L)=55.5atm

c)Calculate the mole fraction of oxygen and its partial pressure inthe mixture of gases produced

2moL CO2+4moLH2O=6moLO2

6moLO2/(3+2+4)=0.67x55.5atm=37.19atm

d)Recalculate the pressure of gas mixture in part b using the vander waals equation, a=4.00 atm L2 moL-2 andb=0.0330L mol-1

This is pretty straight forward using the above information I comeout with 45.87atm

e)Using bond dissociation energies estimate the enthalpy offormation of liquid dimethylhydrazine

Explanation / Answer

x.

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