Question

18.Calculate the mass of a non- volatile solute( molecular mass 40 g/mol) that should be dissolved in 114 g of octane (molecular mass 114 g/mol) to reduce its pressure to 80 %. *

Answer 1

Answer:

Here, let us assume that the required mass of the non-volatile solute is 'x' g. The molar mass of the solute is 40 g/mol. Therefore, the number of moles of solute will be $\dfrac{x}{40}$ = 0.025x moles. Now, mass of octane = 114 g and molar mass of octane = 114 g/mol.

Explanation:

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