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How many mL of water (density = .997g/ml at 25 degree C) are needed to dissolve 10.0g of NH4NO3 in order to prepare a .100m ammonium nitrate solution?
The vapor pressure of pure methyl alcohol at 19 degrees celcius is 90.0 torr and that of pure ethyl alcohol is 40.0 torr. Assume a mixture of methyl alcohol and ethyl alcohol is ideal.
Nicotine is responsible for the addictive properties of tobacco. Assume Kb1= 1.05 x 10^-6 and Kb2= 1.32 x 10^-11. Determine the pH of a 0.00120 M solution of nicotine.
A glass of milk has a volume of 100ml. if the milk has a mass of 103g, what is the density of milk?
Draw the product formed when Reaction of [(1R)-1-methoxypropyl]benzene undergoes substitution with the hydroxide ion
The most common source of copper is the mineral chalcopyrite. How many kilograms of chalcopyrite must be mined to obtain 320. of pure copper?
Calculate the amount of heat required to completely sublime 68.0 g of solid dry ice CO_2 at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kj/mol.
Calculating Kc, Given the amount of reactant in grams in a container at a temperature and amount produced in moles, calculate Kc:
A voltaic cell is based on the reaction Sn + I2 = Sn2+ + 2I-.
An aerosol spray can with a volume of 350 mL contains 3.2 g of propane gas (C3H8) as propellant. What is the pressure (in atmospheres) of gas in the can at 65oC?
the heat of vaporization of benzene, C6H6, is 30.8kJ/mol at its boiling point of 80.1C. How much heat is required to vaporize 102g benzene at its boiling point?
In the decomposition of hydrogen peroxide, the percentage yield of oxygen is 93%. What is the actual yield in grams of oxygen if you start with 100 grams of H2O2.
Describe why barium must be disposed of properly. What are the health effects of excess barium in drinking water? What is the maximum allowable concentration of barium in public water systems?
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