Calculate the rms speed of carbon dioxide molecules at STP. A)12.4 m/s B)155 m/s C)393 m/s D)1.55 × 10 ⁵ m/s E)The answer can't be calculated without more data.

Question

Quizplus · Accepted Answer

The rms speed of a gas molecule can be calculated using the formula:
v_rms = √(3RT/M), where R is the gas constant, T is the temperature in Kelvin, and M is the molar mass of the gas.

At STP, the pressure is 1 atm and the temperature is 273 K. The molar mass of CO2 is 44.01 g/mol.

Plugging in the values we get:
v_rms = √(3(8.31 J/mol*K)(273 K)/(44.01 g/mol)) = 393 m/s

Therefore, the answer is C.

Calculate the Rms Speed of Carbon Dioxide Molecules at STP