Seudónimo Seudónimo

22-04-2018
Chemistry

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99 POINTS CHEMISTRY HOMEWORK
A sample of ammonia liberates 5.61 kJ of heat as it solidifies at its melting point. What is the mass of the sample? ΔHsolid = -5.66 kJ/mol.

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mkryukova19 mkryukova19

22-04-2018

5.61kJ*(1mol/5.66kJ)=0.991 mol NH3
Molar mass NH3= M(N)+3M(H)=14.0+3*1.0=17.0 g/mol
0.991 mol NH3*17.0g/1molNH3 ≈16.8 g NH3

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Hamza1212 Hamza1212

25-04-2018

i think the answer is 5.61kJ*(1mol/5.66kJ)=0.991 mol NH3
Molar mass NH3= M(N)+3M(H)=14.0+3*1.0=17.0 g/mol
0.991 mol NH3*17.0g/1molNH3 ≈16.8 g NH3

Answer Link

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