The text provides a series of calculations involving different chemical elements and compounds, focusing on their masses, moles, and the number of particles. It includes various examples, such as sodium (
(gram of compound*avogadros number/101.105) 4.7558*10^23 atoms of N
(moles=gram of compound/molar mass of compound)= 80g KNO3/101.105 g/mol= 0.791256614 mol
In 8mol of P2O5 there are 640g of O, 2.408*10^25
atoms of O, 16mol of P
(16g*5 atoms *8mol =640)
(8mol *5 atoms* 6.02*10^23 =2.408*10^25)
(8mol * 2atoms =16)