Which expression is a measurement of density? 0.71 mg5.2 cm320 g/cm25.13 kg/l

The answer is 5.13 kg/L

5.13 kg is a unit of mass

L (liters) is a unit of volume

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.