If the molar mass of helium is 4.0 g/mol4.0 g/mol and the molar mass of neon...

Question

Question

If the molar mass of helium is 4.0 g/mol4.0 g/mol and the molar mass of neon is 20.2 g/mol20.2 g/mol, then...

a) All the atoms have exactly the same velocity.

b) All the atoms have the same average speed.

c) The average speed of the helium atoms is greater than the average speed of the neon atoms.

d) The average speed of the neon atoms is greater than the average speed of the helium atoms.

e) The atoms diffuse from high temperature to low temperature.

Explain your answer.

science physics

Answer 1

Answer #1

c) The average speed of the helium atoms is greater than the average speed of the neon atoms.

explanation:

We know that,

v = sqrt (3 RT/M)

where, v is the velocity ; R is the gas constant ; T is the temp and M is the molar mass

So we see that the velocity is inversely porpotional to the molar mass.

Since the molar mass of helium is lesser tha neon, the velocity of He atom will be greater than that of Neon.

Answer 2

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