R= PV/nT R: constant P: Pressure in atm V: Volume in Liters n: moles T: Temperat

Question

R= PV/nT
R: constant P: Pressure in atm V: Volume in Liters n: moles T: Temperature in Kelvin

Would the following laboratory problems increase, decrease, or have no effect on the experimentally calculated value of R? Explain your answer. 1. When you weigh the magnesium, the weight on the balance was 0.054 g and you incorrectly recorded 0.045 g in your notebook? 2. You forgot to include the pressure due to the height difference between the beaker and the column of water? 3. You did not convert the height difference of water from mm H20 to mm Hg?

Explanation / Answer

R = P V / n T

(1) As you recorded less value of mass. It indicates less number of moles, it causes to increase the R value.

(2) Due no P term, R value is decreased

(3) It causes higher P value so, R value increases.

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