From the conversion of units: 1 cm^3 is equivalent to 1 mL 1 L is equivalent to 1000 mL therefore, to convert from liter to cm^3, we simply multiply by 1000. Note that the multiplication will be done in the denominator.
Based on this: density = (0.625 g/l) x (1g/1000 cm^3) = <span> 0.000625 g/cm^3 = 6.25 x 10^-4 g/cm^3</span>
Aldose is monosaccharide sugar in which the carbon backbone chain has carbonyl group on endmost carbon atom which corresponds to an aldehyde, and the hydroxyl groups are connected to all other carbon atoms.
Example - Glucose
Ketone is functional group with structure RC(=O)R', where the groups, R and R' can be variety of the carbon-containing substituents.