A flexible container at an initial volume of 4.11 L contains 7.51 mol of gas. More gas is then added to the container until it reaches a final volume of 15.9 L. Assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the container.

Answer 1

at constant temp and pressure, the volume is directly related to the number of moles

added moles = new moles - 7.51 mol = 7.51 [(15.9 / 4.11) - 1]