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A stoppered flask at 25°C contains 250 ml of water, 200 ml of octanol, and 50 ml of air. An unknown amount of o-xylene is added to the flask and allowed to partition among the phases. After equilibrium has been established, 5.0 mg of o-xylene is measured in the water. What is the total mass of o-xylene present in the flask?
The solubility of barium carbonate,BaCO3, is .0100 g/L . Its molar mass is 197.6 . What is the Ksp of barium carbonate?
Nickel nitrate and potassium carbonate react to form nickel carbonate and potassium nitrate. How many milliliters of 0.55M Ni(NO3)¬2 are needed to react with 85 mL of 0.25M K2CO3? First, write a balanced equation.
Consider the following reaction. N2(g) + 3H2(g) > 2NH3(g) The initial pressures of the H2 IS 3 atm and the pressure of the N2 IS 2 atm. Which statement is true? N2 is a limiting reagent H2 is a limiting reagent Neither gas is a limiting reagent
Which of the following equations represents the proper net ionic equation for the complete neutralization reaction between the weak acid HClO2 (aq) and the strong base KOH (aq)?
2 NH3 + CH3OH → products . How much NH3 is needed to react exactly with 21 grams of CH3OH
degrees C are warmed to 100 degrees C. what is the new volume if the pressure remains constant?
the rate constant k for a first order reaction is 1.36 10 -3 s -1 at 90 degrees celcius and the activation energy is
oxalic acid dihydrate (H2 C2 04). 2H20 (formula weight = 126 g/mol) is sometimes used to standardize NaOH solutions. How many grams of this acid will be required to titrate 45.0 mL of 0.18 M NaOH solution
if 8.40 grams of C are burned, how much heat will be released for the following balanced reaction: C + O2 -> CO2 + heat (393 KJ)
suppose 50.0 ml of 0.250 m cocl2 solution is added to. 25.0 ml of 0.350 m nicl2 solution. calculate the concentration
How many grams of nickel nitrate, Ni(NO3)2, must be dissolved to prepare 200 mL of a 0.152 M aqueous solution of the salt.
In 1773 Ben Franklin poured a teaspoon of oil onto a pond. He observed that it spread out to form a film that covered an area of about 22,000 ft2. If a teaspoon has a volume of about 5 cm3 and if the film was roughly one molecule thick, then what ..
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