Mass spectrometry is extremely sensitive and can detect molecules which may only be present at a level of, milligrams micrograms 10^-1 moles 10a-12 moles

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Which reason best explains why metals are malleable? a)because they have delocalized electrons b)because they have localized electrons c)because they have ionic bonds d)because they have rigid bonds

Using the periodic table, complete the following. element: hydrogen symbol: h₂ molecular weight: g mass of one mole: g/mol