A metal alloy is made up of elements X and Y. The mass of the sample of the metal is 15.3 g. Metal X is present in the sample with a mass of 4.1 g. What is the percent m/m concentration of metal X in the alloy? 1. 26.8 % 2. 73.2 % 3. 63.4% 4. 50.0% 5. 36.6 %

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