Question

2. Calculate the root mean square speed of on oxygen molecule at 288k in SI units.
1) 473.79 ms
2) 573.79 ms
3) 673.79 ms
4) 773.79 ms

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Answer 1

Answer:

i think the answer is option b

Answer 2

Explanation:

molar mass of O2 = 2 x 16

molar mass of O2 = 32 g/mol

Convert this to kg/mol:

molar mass of O2 = 32 g/mol x 1 kg/1000 g

molar mass of O2 = 3.2 x 10-2 kg/mol

using formula Mrms = (3RT/M)^1/2

μrms = (3RT/M)½

μrms = [3(8.3145 (kg·m2/sec2)/K·mol)(288K)/3.2 x 10-2 kg/mol]½

μrms = 473.81 ms