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Atomic Radius

16.The rms sp...

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16.The rms speed of helium in ms-1 (atomic mass =4.0g mol-1 )at 400k is

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Q. The r.m.s speed of helium in ms

^{- 1}

( atomic mass = 4.0 g mol

^{- 1}

) at 400 K is :

R M S

speed of helium at 400K in

m s^{- 1}

Q. At what temperature is the root mean square speed of an atom in an argon gas cylinder equal to the rms speed of a helium gas atom at -20

^{\circ} C

? (atomic mass of Ar = 39.9 u, of He = 4.0 u)

Q. A mixture of

2

moles of helium gas (atomic mass

= 4

1

mole of argon gas (atomic mass

= 40

amu) is kept at

300

K in a container. The ratio of the rms speeds

(\frac{v_{r m s} (h e l i u m)}{v_{r m s} (a r g o n)})

Q. A mixture of

2

moles of helium gas (atomic mass

= 4 u

1

mole of argon gas (atomic mass

= 40 u

300 K

in a container. The ratio of their rms speeds

[\frac{V_{r m s} (h e l i u m)}{V_{r m s} (a r g o n)}]

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