Chemistry · Mole concept, molar mass, percentage composition, empirical and molecular formulae
Calculate the volume occupied by 40 g. of a at if its . is 8
Calculate the volume occupied by 40 g. of a \( C H_{4} \) at \( \mathrm{S.T.P} \) if its \( \mathrm{V} . \mathrm{D} \). is 8
- A. 24 litres
- B. 46 litres
- C. 34 litres
- D. 56 litres
Step-by-step solution
Vapor density (V.D.) = 8 implies molar mass = 2 × V.D. = 16 g/mol. For CH4, molar mass is 16 g/mol, consistent. Moles of CH4 in 40 g = 40/16 = 2.5 mol. At STP, 1 mol occupies 22.4 L, so volume = 2.5 × 22.4 = 56 L.
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