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How many grams of dry NH4Cl need to be added to 1.50 L of a 0.300 M solution of ammonia, NH3, to prepare a buffer solution that has a ph of 8.73? pkb for ammonia is 1.8X10^-5.
draw the mechanism for the ammonolysis of benzoyl chloride
A mixture of nitrogen and hydrogen was allowed to come to equilibrium at a given temperature according to 3H2+N2 2NH3. At equilibrium, the mixture contained
when 50.0 gram of metal at 75.0 C is added to 100 grams of water at 15.0 C the temperature of the water rises to 18.3 C. Assume that no heat is lost to the surroundings. What is the specific heat of this metal
The mineral rhodochrosite [manganese (II) carbonate, MnCO2] is a commercially important source of manganese. Write a half reaction for the oxidation of the manganese in MnCO3 to MnO2 in neutral groundwater
In a titration experiment, 50.0 mL of 0.375 M HI solution is required to neutralize 35.0 mL of Ca(OH)2 solution. What is the concentration of the Ca(OH)2 solution?
Aluminum has chemical propertied that are similar to magnesium. What observation might you expect with the addition of 6M HCl
what will the freezing points be of the resulting solution? kf(H2O)=1.86 C/m
What is the molarity of a solution if 4.50 g NaF is dissolved in enough water to make 250.0 mL of solution?
The accepted toxic dose of mercury is 300ug/day there is 180ug of mercury per cubic meter of air. ingestion of 20,000L air per day is she at risk for mercury poisoning?
how many moles of calcium chloride, cacl2, can be added to 1.5 liters of .020 M potassium sulfate, k2so4, before a precipitate is expected? assume that the volume of the solution is not changed significantly by the addition of magnesium sulfate.
Determine the molality of a solution prepared by dissolving 0.500 moles of CaF2 in 11.5 moles H2O.
A sample of air contains 11.4 µg/m^3 of beryllium dust. How many atoms of beryllium are present in a room with dimensions of 19.1 feet by 12 feet by 13.3 feet? Answer in units of atoms.
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