Aluminum has a density of 2.70 g/cm3 and molar mass of 26.98 g/mol. Its atomic radius is 143 x 10 – 10 cm. 4.10 grams of aluminum foil has an area of 1012.6 cm +2 . a. Determine the thickness of the foil. b. Determine the number of layers of aluminum atoms in the foil. c. Estimate the Avogadro’s Number. (Hint: Avogadro’s Number has a unit of atoms/mol. 2.70 g of aluminum has a volume of 1 cm+3. The volume of aluminum atom has the unit of cm+3/ atom and V = (4/3) π r 3

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".