10. in an experiment in a general chemistry laboratory, a student collected a sample of a gas over water. the volume of the gas was 265 ml at a pressure of 753 torr and a temperature of 27 °c. the mass of the gas was 0.472 g. what was the molar mass of the gas?

47.2 g/mol

Explanation:

According to Dalton's law, the total pressure is the sum of individual pressures.

=753 torr

= 26.7 torr at

According to the ideal gas equation:'

P = Pressure of the gas = 726.3 torr = 0.95 atm    (760torr=1atm)

V= Volume of the gas = 265 ml = 0.265 L   (1L=1000ml0

T= Temperature of the gas = 27°C = 300 K       (0°C = 273 K)

R= Gas constant = 0.0821 atmL/K mol

n=  moles of gas=

moles of gas=

Thus the molar mass of the gas will be 47.2 g/mol

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante