PART A A certain gas is present in a 15.0 L cylinder at 3.0 atm pressure. If the pressure is increased to 6.0 atm the volume of the gas decreases to 7.5 L . Find the two constants ki, the initial value of k, and kf, the final value of k, to verify whether the gas obeys Boyle’s law by entering the numerical values for ki and kf in the space provided.
Express your answers to two significant figures separated by a comma.

PART B
Chlorine is widely used to purify municipal water supplies and to treat swimming pool water. Suppose that the volume of a particular sample of Cl2 gas is 8.70 L at 890 torr and 22 ∘C.

How many grams of Cl2 are in the sample?
Express your answer using three significant figures.

What volume will the Cl2 occupy at STP?
Express your answer using three significant figures.

At what temperature will the volume be 15.30 L if the pressure is 873 torr?
Express your answer using three significant figures.

At what pressure will the volume equal 6.50 L if the temperature is 54 ∘C?
Express your answer using three significant figures.