When 3.00 g of a substance ' X ' is dissolved in 100 g of CCl 4, it raises the boiling point by 0.60 K. The molar mass of the substance ' X ' is g mol -1. (Nearest integer). [ Given K b for CCl 4 is 5.0 K kg mol -1 ]

Question

When 3.00 g of a substance ' X ' is dissolved in 100 g of CCl 4, it raises the boiling point by 0.60 K. The molar mass of the substance ' X ' is g mol -1. (Nearest integer). [ Given K b for CCl 4 is 5.0 K kg mol -1 ] (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

Δ Tb=Kb × molality 0.60=5 ×((3 / M/100 / 100)) M=250

Q. When $3.00 g$ of a substance ' $X$ ' is dissolved in $100 g$ of $CC l_{4}$ , it raises the boiling point by $0.60 K$ . The molar mass of the substance ' $X$ ' is_______ $g m o l^{- 1}$ . (Nearest integer).
[ Given $K_{b}$ for $CC l_{4}$ is $5.0 K k g m o l^{- 1}$ ]

$Δ T_{b} = K_{b} \times$ molality
$0.60 = 5 \times (\frac{3/ M}{100/100})$
$M = 250$

Q. When 3.00g of a substance ' X ' is dissolved in 100g of CCl4​, it raises the boiling point by 0.60K. The molar mass of the substance ' X ' is_______ gmol−1. (Nearest integer). [ Given Kb​ for CCl4​ is 5.0Kkgmol−1 ]

ΔTb​=Kb​× molality 0.60=5×(100/1003/M​) M=250

Q. When $3.00 g$ of a substance ' $X$ ' is dissolved in $100 g$ of $CC l_{4}$ , it raises the boiling point by $0.60 K$ . The molar mass of the substance ' $X$ ' is_______ $g m o l^{- 1}$ . (Nearest integer).
[ Given $K_{b}$ for $CC l_{4}$ is $5.0 K k g m o l^{- 1}$ ]

$Δ T_{b} = K_{b} \times$ molality
$0.60 = 5 \times (\frac{3/ M}{100/100})$
$M = 250$