Question

ولما
10g of substance dissolve in loog of
water raised its boiling point by 0.98 °c
calculate the molecular want of
substance Kb
for water is
0.52°c/molality​

Answer 1

ΔT

b

=K

b

× molality

0.80=0.52×

M

w

×185

12.5×1000

M

w

=

185×0.8

0.52×12.5×1000

M

w

=43.92 g mol

−1

I hope this helps you