Mole ConceptMedium
Question
How many atoms do mercury vapour molecules consist of if the density of mercury vapour relative to air is 6.92? The average mass of air is 29 g per mole (Hg = 200).
Options
A.1
B.2
C.4
D.Infinite
Solution
If the atomicity of mercury is ‘x’, then 200x = 6.92 × 29 ⇒ x ≈ 1.
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