5. When. 0.333g of a particular molecular compound dissolves in 33.3 grams of benzene, the freezing point was observed to drop b

Question

mote1985 [20]

1 year ago

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5. When. 0.333g of a particular molecular compound dissolves in 33.3 grams of benzene, the freezing point was observed to drop b

y 0.485 °C. (In actual practice this is absurdly precise for a temperature measurement, but it makes the problem easier to solve.) What is the molecular weight of the molecular compound?

Chemistry

1 answer:

Ivanshal [37] · Answer 1 · 2023-11-22T14:08:08+03:00

The molecular weight of the molecular compound is

x= 105.57 g/mol

<h3>What is the molecular weight of the molecular compound?</h3>

Generally,a the equation for Mole of molecular compound is mathematically given as

Mm= mass / molar mass

Therefore

Mm= 0.333 g / x

the equation for Morality

M = mole of solute / mass of solvent

$M = \frac{(0.333 g / x )}{33.3 g / 1000 }$

M= 10 / x

the equation for change in temp dt

dt= K* morality

Therefore

$0.485 = \frac{5.12}{ * 10/ x}$

x = (5.12 *10) / 0.485

x = 105.57 g/mol

In conclusion, molecular mass of molecular compound

x= 105.57 g/mol