Amedeo Avogadro (1776-1856), an Italian physicist, contributed to the world of chemistry in many ways. His main contribution,

Question

Amedeo Avogadro (1776-1856), an Italian physicist, contributed to the world of chemistry in many ways. His main contribution, however, was Avogadro's hypothesis, which eventually led to Avogadro's number. Avogadro's number is the number of items in one mole and has a value of Avogadro's number = 6.02 x 1023 We can use Avogadro's number as a conversion factor for moles and atoms, molecules, or formula units using the following ratios: or
 6.02×1023 atoms/  1 mole of atoms 
6.02×1023 molecules/1 mole of molecules 
6.02x1023 formula units/ 1 mole of substance 
Calculate the number of molecules in 5.00 moles H₂S.
 Express your answer numerically in molecules. 
H₂S molecules Calculate the number of moles of Cl atoms in 3.61x1024 formula units of magnesium chloride, MgCl₂.

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