Question

1. High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressures used in this procedure range from around 500 kilopascals (500,000 Pa) to about 60,000 kPa (60,000,000 Pa). It is often convenient to know the pressure in torr. If an HPLC procedure is running at a pressure of 2.40×108 Pa , what is its running pressure in torr? Express the pressure numerically in torr.

2.40×10⁸ Pa = ______ torr

2. A sample of gas has an initial volume of 3.89 L at a pressure of 709 mmHg. If the volume of the gas is increased to 5.36 L , what will the pressure be? (Assume constant temperature.) __________?

3. Use the ideal gas law to complete the table:

P	V	n	T
1.07 atm	1.26 L	0.102 mol	___
119 torr	___	0.240 mol	307 K
___	28.3 mL	1.81×10−3 mol	25.1 ∘C
0.563 atm	0.442 L	___	251 K

3a. Complete the first column. P=_____ atm

3b. Complete the second column. V= ______ L

3c. Complete the third column. n= ______ mol

4d. Complete the fourth column. T=_______ K

Answer 1