A scientist is trying to discover information about an unknown metal in a compound. The formula for the compound is believed
to be XBr3, where X is the unknown metal. The scientist determined that a 4.742 g sample of this compound contains 4.813 x 10-2 mol Br. Calculate the atomic mass of the unknown metal, X.
atomic mass= amu

What is the identity of the metal? Provide the name or symbol of the element.
Metal: