Chemistry Practice Problems Atomic Theory Practice Problems Solution: The chloride of an unknown metal is believed to ha...

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Solution: The chloride of an unknown metal is believed to have the formula MCl3. A 1.891 g sample of the compound is found to contain 3.606 x 10 - 2  mol Cl.Find the atomic mass of M.

Problem

The chloride of an unknown metal is believed to have the formula MCl3. A 1.891 g sample of the compound is found to contain 3.606 x 10 - 2  mol Cl.

Find the atomic mass of M.

Solution

From the chemical formula of the compound, in 1 mole of MCl3 there is:

• 1 mol M
• 3 mol Cl


Calculate the moles of MCl3 using mole to mole comparison:

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