1. Hydroxyapatite, Ca5(PO4)3(OH), is a naturally occurring mineral in the bone. A. Calculate the mass (g) of 7.161 x 1015 molecules hydroxyapatite. B. An average adult weighs 70 kg. The human bones make up about 18% of the total body weight, and 70% by weight of human bone is hydroxyapatite. Calculate the number of moles of hydroxyapatite in an average adult.

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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".