Which of the following gases will have the highest rate of effusion at a given temperature?

cl2
he
o2
ne

He

Explanation:

Movement of of gaseous molecules through tiny hole is called effusion.

At a given temperature, rate of effusion of gases is related with the molar mass (M) of the gases as:

Therefore, higher the molar mass of the gas, lower will the rate of effusion.

Molar mass of = 70 g/mol

Molar mass of He = 4.0 g/mol

Molar mass of = 32 g/mol

Molar mass of Ne = 20.17 g/mol

Since, molar mass of He is lowest among given, so rate of effusion of He will be the highest.

answer: lol

explanation:

lol

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm