Answer to Question #193070 in Physical Chemistry for JOHN

Question

A flexible container at an initial volume of 5.120 L contains 8.500 mol of helium. More

helium is then added to the container until it reaches a final volume of 18.10 L. Assuming

the pressure and temperature of the gas remain constant, calculate the number of moles of

helium added to the container. Calculate the mass of helium added.

Answer 1

Moles of Helium;

$\Delta n=21.549mol$

Mass of helium=86.2g