3. Which of the following gas samples occupies the lowest volume at the same temperature and pressure? [Atomic mass of F = 19u, H = lu] a) lg of ethane b) 1g of Neon c) Ig of fluorine d) 1g of Oxygen.
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believe it is D
Assuming ideal gas then PV = nRT
At same P and T then it becomes V = nR and R is constant meaning V = n.
As n = moles = mass/molar mass then lower molar mass is higher n as mass is constant:
ethane molar mass = C2H6 = 30
oxygen molar mass = O2 = 32 (diatomic)
fluorine molar mass = F2 = 38 (diatomic)
neon molar mass = N = 20
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