Zinc reacts with aqueous sulfuric acid to form hydrogen gas: Zn(s) + H2SO4(aq)---> ZnSO4(aq) + H2 (g) In an experiment 22mL of water H2 is collected over water at 27degreesC and a barometric pressure of 732 torr. The vapor pressure of water at 27degreesC is 26.74 torr. What is the partial pressure of H2 in atm units? How many moles of H2 gas were produced? How many grams of Zn have been consumed?

(a) If a 500-mL glass beaker is filled to the brim with ethyl alcohol at a temperature of 5.00oC how much will overflow when its temperature reaches 22.0oC? (b) How much less water would overflow under the same conditions?

Visited The common laboratory solvent chloroform is often used to purify substances dissolved in it. The vapor pressure of chloroform, CHCl3, is 173.11 mm Hg at 25 °C. In a laboratory experiment, students synthesized a new compound and found that when 12.94 grams of the compound were dissolved in 226.8 grams of chloroform, the vapor pressure of the solution was 168.89 mm Hg. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight of this compound? (Chloroform = CHCl3 = 119.40 g/mol) Molecular weight = g/mol

The vapor pressure of ethanol is 54.68 mm Hg at 25°C. How many grams of saccharin, C7H5NO3S, a nonvolatile, nonelectrolyte (MW = 183.2 g/mol), must be added to 291.8 grams of ethanol to reduce the vapor pressure to 53.29 mm Hg? ethanol = CH3 CH₂ OH = 46.07 g/mol. Mass = 13.95 g ?