Problem: A chloride salt MCl2 is 63.89% chlorine by mass. What is the identity of M?

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We are to find the identity of the cation in a chloride salt given the mass percent. From the formula of MClthere are 2 moles of the chlorine atom for every mole of the compound. Meanwhile, 1 mole of M is present in 1 mole of the chloride salt. 

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A chloride salt MCl2 is 63.89% chlorine by mass. What is the identity of M?

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Our tutors have indicated that to solve this problem you will need to apply the Mass Percent concept. You can view video lessons to learn Mass Percent. Or if you need more Mass Percent practice, you can also practice Mass Percent practice problems.