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1. M(s) + 2H+ (aq) --> M2+ (aq) +2Cl- + H2 (g) An unknown metal (0.3812g)...

1. M(s) + 2H+ (aq) --> M2+ (aq) +2Cl- + H2 (g)

An unknown metal (0.3812g) is reacted with excess acid according to the following equation to produce 385mL of gas. The hydrogen gas is collected over water at a temperature of 22oC and an atmospheric pressure of 765mmHg. The partial pressure of water at 22oC is 19.5mmHg. Is the unknown metal Al, Mg, or Zn?

2. Isoflurane (F3C---CHClOCHF2) is a commonly used surgical anesthetic delivered by inhalation. What is the partial pressure of each gas if 21.0g of Isoflurane is mixed with 24.6g of oxygen gas and the total pressure is 937mmHg?

3. Hydrogen filled balloons are used for monitoring weather. Suppose a balloon is launched on a warm moring with a volume of 1.00x106L at a temperature of 23oC and an atmospheric pressure of 759mmHg. The balloon rises to a height where the pressure is 71mmHg and the temperature is 235.1K. What wil be the new volume of the balloon? (You may assume that no gas leaves the balloon).

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