How much slower is the root-mean-square speed of WF6 than Ar at 300 K? Express your...

Question

Question

How much slower is the root-mean-square speed of WF6 than Ar at 300 K?

Express your answer using one significant figure.

Answer 1

Answer #1

Root mean square speed = √(3RT/M)

Molar mass of WF6 = 297.83 g/mol

Molar mass of Ar = 39.95 g/mol

RMS(WF6)/RMS(Ar) = (√(3RT/297.83)/√(3RT/39.95))

RMS(WF6)/RMS(Ar) = √39.95/√297.83

= 6.32/17.25

= 0.366

= 0.4

Hence, RMS of WF6 is 0.4 times slower than that of Ar

Answer 2

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