If a 0079-G Sample of Unknown Metal (X)reacts with Acid to Give

question 73

Multiple Choice

If a 0.079-g sample of unknown metal (X) reacts with acid to give 66.0 mL of hydrogen gas at 22 °C and 732 mm Hg,what is the unknown metal? 2 X(s) + 6 HCl(aq) → 2 XCl3(aq) + 3 H₂(g)

• A)Al
• B)Cr
• C)Ga
• D)Fe
• E)Sc

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