A 0.158-g sample of unknown metal, X, reacted with hydrochloric acid according to the following balanced reaction:  2 X (s) + 6HCl (aq) -> 2 XCl3 (aq) + 3 H2 (g) The volume of the hydrogen gas collected over water was 216 mL at 22 degress C and a barometer reading of 764 mm Hg (VP of water at 22 degrees C is 20. mm Hg) (a) Determine the molar mass of "X" knowing that the molar mass is grams per mole: 1) atomic mass of metal 2) identiy of unknown metal

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