Part B The pressure in car tires is often measured in pounds per square inch (lb

Question

Part B
The pressure in car tires is often measured in pounds per square inch (lb/inches2), with the recommended pressure being in the range of 25 to 45 lb/inches2. Suppose a tire has a pressure of 42.5lb/inches2 . Convert 42.5lb/inches2 to its equivalent in atmospheres.
Express the pressure numerically in atmospheres.


Part C
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 (60,000,000Pa ). It is often convenient to know the pressure in torr. If an HPLC procedure is running at a pressure of 4.45

Explanation / Answer

we have 1lb/in ^2 = 6.8 * 10^-2 atm Now 42.51 lb/in^2 = 42.51 * 0.068 atm = 2.89 atm now 1 torr = 133.33 Pa 4.45 * 10^8 Pa = 4.45* 10^8 / 133.3 = 3..38 * 10^6 torr

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