What do the different colour heart emojis mean? Does a red , yellow , green , blue and violet emoji all mean the same thing according to you? Solitude4
1 The relative atomic mass, or atomic weight, of an element is the weighted average of the masses of the isotopes in the naturally occurring element relative to the mass of an atom of the carbon-12 isotope which is taken to be exactly 12.
Take an amount of the substance and find its mass. The density is the mass divided by the volume. Typical units would be kg / m3 or g/L. English units are usually in weight per unit volume such as pounds/cubic foot or ounces / gallon.