Question

NEED HELP QUICKLY!!! Calculate the volume of each of the following gases at STP. Show your work.
A. 7.6 mol Ar
B. 0.44 C2H6
C. 3.6 NH3

Answer 1

Answer:

A. V Ar = 185.7136 L

B. V C2H6 = 10.752 L

C. V NH3 = 87.97 L

Explanation:

STP:

∴ T = 25°C ≅ 298 K

∴ P = 1 atm

assuming ideal gas:

• PV = RTn

⇒ V = RTn / P

∴ R = 0.082 atm.L/K.mol

A. n Ar = 7.6 mol

⇒ V Ar = ((0.082 atm.L/K.mol)(298 K)(7.6 mol)) / (1 atm) = 185.7136 L

B. n C2H6 = 0.44 mol

⇒ V = 10.752 L

C. n NH3 = 3.6 mol

⇒ V = 87.97 L