Solid aluminum reacts with aqueous H2SO4 to form H2 gas and aluminum sulfate. When a sample of Al is allowed to react, 415 mL of gas is collected over water at 23 °C, at a pressure of 755 mmHg. At 23 °C, the vapor pressure of water is 21 mmHg.
2Al(s) + 3H2SO4(aq) → 3H2(g) + Al2(SO4)3(aq)
a. What is the pressure, in millimeters of mercury, of the dry H2 gas?
b. How many moles of H2 were produced?
c. How many grams of Al were reacted?
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