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A solution is prepared by mixing 500 mL of 0.10 M NaOCl and 500 mL of 0.20 M HOCl. What is the pH of this solution?   [Ka(HOCl) = 3.2 x 10–8]

Calculate the amount of heat necessary to raise the temperature of 12.0 g of water from 15.4°C to 93.0°C. The specific heat of water = 4.18 J/g·°C.

What is the freezing point of a solution that contains 15.0 g of glucose (C6H12O6) in 120 g of H2O?   Kf for water is 1.86°C/m.

What is the pH of a 0.20 M solution of NH4Cl?  [Kb(NH3) = 1.8 x 10–5]

At what temperature will a fixed amount of gas with a volume of 175 L at 15°C and 760 mmHg occupy a volume of 198 L at a pressure of 640 mm Hg?

For the following reaction at equilibrium, which choice gives a change that will shift the position of equilibrium to favor formation of more products? 2NOBr(g)   ↔   2NO(g) + Br2(g),     DHºrxn = 30 kJ/mol

Which of the following would be expected to have the highest vapor pressure at room temperature?

The combustion of butane produces heat according to the equation  2C4H10(g) + 13O2(g) -> 8CO2(g) + 10H2O(l)    Δ{“version”:”1.1″,”math”:”Δ”}H°rxn = –5,314 kJ/mol  What is the heat of combustion per gram of butane?

1.018 g of Freon-113 gas is trapped in a 145 mL container at 760. mmHg and 50.0°C.  What is the molar mass of Freon-113?

If the pressure of a gas sample is quadrupled and the absolute temperature is doubled, by what factor does the volume of the sample change?