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0.204 g of an unknown compound dissolved in 180 mL of water has an osmotic pressure of 26.2 mmHg at 24.0°C.  Calculate the molar mass of the compound. (R = 0.0821 L·atm/K·mol)

For the reversible reaction SO2(g) + NO2(g)   ↔   SO3(g) + NO(g), the equilibrium constant is 18.0 at 1,200ºC.  If 1.0 mole of SO2 and 2.0 moles of NO2 are placed in a 20 L container, what concentration of SO3 will be present at equilibrium?

A 0.10 M NH3 solution is 1.3% ionized.  Calculate the H+ ion concentration.             NH3 + H2O → NH4+ + OH–

What is the osmotic pressure of a solution that contains 16.2 g of propyl alcohol (C3H7OH) dissolved in enough water to make 400 mL of solution at 27°C?

What is the molality of a solution that is 6.72 % by mass calcium chloride?

Calculate the standard enthalpy change for the reaction    2C8H18(l) + 17O2(g) ->16CO(g) + 18H2O(l).             Given: 2C8H18(l) + 25O2(g) -> 16CO2(g) + 18H2O(l)    Δ{“version”:”1.1″,”math”:”Δ”}H° = –11,020 kJ/mol 2CO(g) + O2(g) -> 2CO2(g)                              Δ{“version”:”1.1″,”math”:”Δ”}H° =   –566.0 kJ/mol

What college do you currently attend?  

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