Question

the realtive lowering of vopour pressure produce by dissolving 72gm of a substance in 1000gm of water is 0.009. What is the molecular mass of the substance?​

Answer 1

Answer:-

Molecular mass of the substance is 109.81g/mole .

Explanation:- :-

The relative vapour pressure caused by dissolving a substance in water is given as

R.L.V.P = ∆P /P₀ =P₀- P₅/P₀ = Xsolute

Where , ΔP is lowering of vapour pressure .

⟹P₀ = Vapour pressure of pure solvent

⟹Xsolute = mole fraction of non volatile solution .

Given ,

• mass of solute= 72g
• mass of water/solvent = 1000g
• Relative lowering of vapour pressure = 0.0009
• suppose molar mass of solute = M

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Solution is refered to the attachment

Answer 2

Answer:

refer to this attachment ✅✅