PART A) High-pressure liquid chromatography (HPLC) is a method used in chemistry

Question

PART A)

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 3.71×108 Pa , what is its running pressure in torr?

Express the pressure numerically in torr.

PART B)

A balloon begins at a volume of 15.00 L and is at a temperature of 27.5 °C. If its temperature is reduced to 13.5 °C, what is the new volume?

Explanation / Answer

Solution :-

760 torr = 101,325 Pa

You can use this to make a conversion factor.

760 torr / 101,325 Pa

Multiply the factor by the given pressure.

3.71 x 10^8 Pa x 760 torr / 101,325 Pa = 2.783 x 10^6 torr

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