When Active Metals Such as Magnesium Are Immersed in Acid $\circ$

question 20

Multiple Choice

When active metals such as magnesium are immersed in acid solution, hydrogen gas is evolved. Calculate the volume of H₂(g) at 30.1 ^$\circ$ C and 0.85 atm that can be formed when 275 mL of 0.725 M HCl solution reacts with excess Mg to give hydrogen gas and aqueous magnesium chloride.

• A) 3.4 * 10^-3 L
• B) 2.2 L
• C) 2.9 L
• D) 5.8 L
• E) 11.7 L

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