. 100ml of ethylalcohol is made upto alitre with distilled water. If t

1.	. 100ml of ethylalcohol is made upto alitre with distilled water. If the density ofC,H,OH is 0.46 gr/ml. then its molality is
Answer» 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

. 100ml of ethylalcohol is made upto alitre with distilled water. If the density ofC,H,OH is 0.46 gr/ml. then its molality is

Answer»

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