Question

. 100ml of ethylalcohol is made upto a
litre with distilled water. If the density of
C,H,OH is 0.46 gr/ml. then its molality is​

Answer 1

Answer:

10/9 m

Explanation:

Mass of ethanol = Volume × Density

= 100 ml × 0.46 g/ml

= 46 g

Moles of ethanol = Mass / Molar mass

= 46 g / (46 g/mol)

= 1 mol

Volume of water in the solution = 900 ml

Density of water = 1 g/ml

Mass of water = Volume × Density

= 900 ml × 1 g/ml

= 900 g

= 0.9 kg

Molality = Moles of solute / kg of solvent

= Moles of Ethanol / (kg of water)

= 1 mol / (0.9 kg)

= 10/9 m