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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 4.727 g sample of this compound contains 5.317×10−2 mol Br . Calculate the atomic mass of the unknown metal, X .
Atomic Mass=

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

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The atomic mass of X is 56 and the element is iron.

What is the identity of element X?

In this problem, we are given a compound to obtain the identity of the unknown element therein.

We already can relate that;

Number of moles = mass/molar mass

Number of moles Br  = 0.04806 moles

Molar mass of Br could be obtained as 79.9 g/mol

We have;

Mass = Number of moles x molar mass

         = 0.04806x 79.9

       = 3.84 g

Mass of X = 4.735 - 3.84

                 = 0.895 g

Given that there are 3 moles of Br for every 1 mole of X. We have 0.04806 mole of Br present in 4.735 g, then the number of moles of X present would be:

                              0.04806/3 = 0.01602 moles

Molar mass = mass/mole

                     = 0.895/0.01602

                          = 55.87 or 56 g/mol

Hence, the element X is iron

Learn more about molar mass: brainly.com/question/12127540

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