How many atoms of carbon are in 10.0 grams of carbon?
no.moles of carbon = mass/relitive molecular mass = 10/12 = 0.833
no atoms in a mole = 6.022 x 1023, and we have 0.833 of a mole = 5.0183 x 1023 atoms in 10g of carbon.
The gram atomic mass of aluminum is 26.9815. 100 grams therefore constitutes 100/26.9815 or about 3.706 gram atoms of aluminum. Each gram atom contains Avogadro's Number of atoms; therefore, 3.706 gram atoms contains 3.706 X 6.022 X 1023 or 2.23 X 1024 atoms, to the justified number of significant digits.
There cannot be more than 100 different atoms. I think you are confusing atoms and molecules. There are millions upon millions of different molecules because molecules are combinations of the 100 atoms. These combinations can be any number of the same atoms or of different atoms in different combinations. For example, the so-called hydrocarbons. These are different combinations of hydrogen and carbon: 1 carbon atom combined with 4 hydrogen atoms: methane, same as the natural…
Diamond and graphite both are allotropes of carbon. The carbon atoms in both are bonded to each other by sharing electrons. Diamond is 100% carbon and graphite is 95-97% carbon. In diamond each carbon atom is bonded to its four adjacent carbon atoms whereas in graphite each carbon atom is bonded to its three adjacent carbon atoms.