In the following balanced reaction: 2Al(s) + 6HCl(aq) → 2AlCl3(s) + 3H2(g) 2.32 g of Al react with excess HCl to produce hydrogen gas which is passed through water and collected at 25oC and a barometric pressure of 7.40 x 102 Torr. The vapour pressure of water at 25oC is 23.770 Torr. Calculate the root-mean-squared velocity of the hydrogen gas molecules at this temperature.

What mass of H2 gas can be collected over water from a 250-mL flask at a temperature of 25ºC and a pressure of 105.325 kPa? (The vapour pressure of H2O at these conditions is 3.169 kPa.)

A gas follows the equation state: p=RT/V_m - a/(V_m^2 ) and the strength of intermolecular interaction a > 0. Answer the following questions. (a) Derive the expression (∂p/(∂V_m ) )_T in terms of R, T, a, and/or Vm.  (b) Derive the expression (∂p/∂T )_(V_m ) in terms of R, T, a, and/or Vm.  (c) Which of the above partial derivatives ((∂p/(∂V_m ) )_T and (∂p/∂T )_(V_m )) CANNOT have a negative value? Note that temperature is in Kelvin scale, and temperate cannot go below 0 K. (d) Can the pressure p in the above equation of state be a state function? Namely, is the total differential dpexact? Show your detailed derivation.

A 10.0 mL sample of CO2 is collected by the downward displacement of water at 23.0°C and a room pressure of 100.5 kPa. What is the volume of dry CO2 at 0.00°C and 90.0 kPa?