Answer
Mass in grams= 364.7 g or 3.64$\times10^{2}$ g
Mass in kg = 3.647$\times10^{-1}$ kg
Work Step by Step
The given compound is CC$l_{4}$ .
Mass of Cl= 35.45 u. Mass of carbon= 12.01 u.
Molar mass of $CCl_{4}$= 12.01 g+ 4$\times$35.45 g =153.81g.
Number of moles= 2.371 (given)
Mass in grams= Number of moles$\times$Molar mass $\approx$364.7 g
Mass in kilograms= 364.7$\times$$10^{-3}$ = 0.3647 kg.