Question : A flexible container at an initial volume of 8.15 L contains 9.51 mol of gas. More gas is then added to the container until it reaches a final volume of 15.1 L. Assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the container.
Question : Calculate the pH at 25 degrees C of a 0.0026 M solution of a weak base with a Kb of 5.1x10^-9.
pH= __________
Question : it is common to dilute stock solution to a specific concentration when it is used. How many mL of 6.0 M H2SO4 solution will be needed to prepare 10-L 0.1M H2SO4 solution