Calculate the most probable speed, the mean speed, and the mean relative speed of 'cos molecules at 20°c

Explanation:

The expression for the most probable speed is:

R is Gas constant having value = 8.314 J / K mol

M is the molar mass of gas

Given that : The gas is Carbon dioxide (Corrected and assumed)

Molar mass of = 44.01 g/mol

Also, 1 g = 0.001 kg

So, Molar mass of = 0.04401 kg/mol

Temperature = 20°C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15  

So,  

T = (20 + 273.15) K = 293.15 K  

T = 293.15 K

Thus,

The expression for the mean speed is:

R is Gas constant having value = 8.314 J / K mol

M is the molar mass of gas

So, Molar mass of = 0.04401 kg/mol

T = 293.15 K

Thus,

The expression for the root mean square speed is:

R is Gas constant having value = 8.314 J / K mol

M is the molar mass of gas

Molar mass of = 0.04401 kg/mol

Temperature 293.15 K

Thus,

c) should be the answer.