Question

Calcular el número de moles de un gas ideal que ocupa un volumen de 750 mL cuando se mide a 22 °C y 680 torr.

Answer 1

V = 750 /1000 = 0.750 L

P = 680 torr

760  torr ------- 1 atm
680 torr ----- -    x
x = 0.897 atm.

T = 22 + 273 = 295 K
R= 0.0822 (L atm/ mol K)

P x V = n (moles) x R x T

n = P x V
     ````````
      R x T

n = 0.897 atm x 0.750 L
     ``````````````````````````````
     (0.0822 (L atm/mol K) x 295 K

n = 0.0277 moles