Q. Why are volume (ml) and weight (g) different?
Water (1.00 g/ml) weighs 1g per 1ml, but flour (about 0.55 g/ml) contains air between its particles, so a 200ml cup holds only about 110g. Soy sauce (1.15 g/ml) and honey (1.40 g/ml) are denser than water. These figures are estimates and do not guarantee an exact result.