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The mineral galena is composed of lead(II) sulfide and has an average density of 7.46 g/cm³. There would be 87.8 g Pb atoms.
What is density?
Mass per unit of volume is referred to as density, volumetric mass density, or specific mass. Although the Latin letter D can also be used, the symbol for density is most frequently written as (the lower case Greek letter rho). By dividing mass by volume, we may define density mathematically:
[tex]p =\frac{m}{V}[/tex]
where the mass m, the volume V, and the density ρ are all present. Density is sometimes loosely described as weight per unit volume, for example, in the oil and gas business in the United States. This definition is incorrect from a scientific standpoint; the term specific weight is more appropriate.
The density and mass concentration of a pure substance are numerically equivalent.
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