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# Gas Constant and Wavelength

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Question #1

Given the following data from a student, who completed the Gas Law Experiment calculate the gas constant, R

Mass of magnesium = .026g
Initial syringe volume = 0.0 mL
Final syringe volume = 23.5 mL
Temperature = 23.0 degrees Celsius
Barometric pressure = 764.2 mm Hg

Question #2

Calculate the wavelength of light emitted when an electron transitions from the n=5 level to n=2. Identify what type of electromagnetic radiation that is.

https://brainmass.com/chemistry/energetics-and-thermodynamics/gas-constant-wavelength-540223

#### Solution Preview

1.
P = 764.2 mm of Hg == 0.7642 * 13.6*10^3*9.8 (=h*d*g)
=> P = 1.0185*10^5 Pa

V = 23.5 mL = 23.5*10^(-6) m^3

No. of mo moles, n = 0.026/24.305 = 1.07*10^(-3) ...

#### Solution Summary

From given experiment data, Gas constant R is estimated. In second problem, corresponding to transition of electron from one level to other, wavelength of emitted wave is estimated.

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