Question

$2.82$g of glucose is dissolved in 30 g of water. The mole fraction of glucose in the solution is.

• A. $0.01$
• B. $0.99$
• C. $0.52$
• D. $1.66$

Answer 1

Answer: (A)

$0.01$

Answer 2

(1) : No. of moles of glucose =

$\frac{w}{M} = \frac{2.82}{180} = 0.01567$

No. of moles of water

$= \frac{w}{M} = \frac{30}{18} = 1.667$

Total no, of molesd of solution= $0.01567 + 1.667 = 1.683$

Mole fraction of glucose =

$\frac{0.01567}{1.683} = 0.0093 = 0.01$