Mass of Substance = Volume of Substance x Density of Substance
Density of methyl isoamyl ketone = 888.0 kg/m3
Density of methyl isoamyl ketone in pound/cup(US) = 0.888
Mass of a Substance = 0.888 x 2
2 cup(US) of methyl isoamyl ketone weighs 1.776 pound