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Suppose 8.26 g of solid Mg(OH)2 is added to 36.1 mL of 0.488 M H2SO4 solution. What will the concentration of Mg2+ be when all of the acid has been neutralized?
How many grams of Mg(OH)2 will not have dissolved?
Calculate the quantity of heat in calories release when 241.62 g of water is cooled from 80.6°C to 28.0°C.
Crime scene investigators keep a wide variety of compounds on hand to help with identifying unknown substances they find in the course of their duties
Dibenzalacetone is commonly used in sunscreens. Suggest what properties are valuable in a compound for use as a sunscreen.
A mixture of CaCO3 and CaO weighing 0.630 g was heated to produce gaseous CO2. After heating, the remaining solid weighed 0.500 g.
Calculate the heat lost by the hot water, Calculate the heat gained by the cold water, Calculate the calorimeter constant, using the delta T of the cold water.
A titration is performed by adding 0.400 M KOH to 40.0 mL of 0.300 M HCl. What is the pH after addition of 5.0 mL of the base?
Write the net ionic equation for a solution of calcium chloride and a solution of mercury(1) nitrate
A sample of KHP weighed 1.126 g. Titration of this KHP required 20.19 ml of base (NaOH). What is the molarity of the base?
calculate the equilibrium concentration of HI when 0.500 M HI, 0.0200 M H2, and 0.0200 M I2 are placed in a sealed flask and allowed to reach equilibrium. Kc for this reaction is 50 at 445 ºC.
Radioactive isotopes often occur together in mixtures. Suppose a 190 sample contains , with a half-life of 12 days, and , with a half-life of 4.5 days. If there are initially twice as many calcium atoms as there are barium atoms, what will be the ..
A first order reaction has a rate constant of 0.342 sec^-1 at 29.5 degrees C. If the activation energy is 69 kJ, calculate the temperature in degrees C at which the rate constant is 0.428 sec^-1.
The temperature of the calorimeter rose from 25C to 33.73C. If the heat capacity of the calorimeter was 9,630 J/C, what is the value of delta H for the combustion reaction in KJ/mol.
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