Mass of Substance = Volume of Substance x Density of Substance
Density of chloroform = 1489.2 kg/m3
Density of chloroform in gram/ounce(US) = 357.408571853715
Mass of a Substance = 357.408571853715 x 11
11 ounce(US) of chloroform weighs 3931.494290390865 gram