Mercury(II) nitrate is a compound formerly used to treat fur to make felt for hats. It can also cause a psychological illness, which is where the phrase 'mad as a hatter' originated. Mercury(II) nitrate is synthesized by the reaction of mercury metal with hot concentrated nitric acid: Hg(l) + 2 HNO₃(aq) → Hg(NO₃)₂ + H₂(g) What mass in grams of mercury metal would be required to form 7.55 grams of mercury(II) nitrate?

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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".