A scientist is trying to discover information about an unknown metal in a compound. The formula for the compound is believed to be XBr3XBr3 where XX is the unknown metal. The scientist determined that a 4.712 g4.712 g sample of this compound contains 4.846×10−2 mol Br4.846×10−2 mol Br. Calculate the atomic mass of the unknown metal, XX. atomic mass:  metal:

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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".