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Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of KOH required for precipitation to begin in each case.
A: 2.0*10-2 M CaCl2
B. 2.4*10-3 M Fe(NO3)2
C. 1.8*10-3 M MgBr2
If a raindrop weighs 57 mg on average and 5.1 X 10^5 raindrops fall on a lawn every minute, what mass of rain falls (in kg) on the lawn in 1.5 hours?
The osmotic pressure of a aqueous solution of a given polymer with mass concentration 0.300 g/mL is 10.0 torr at 298 K. Estimate the molar mass of the polymer.
What term describes a solution in which the solute concentration exceeds its equilibrium concentration under the prevailing conditions?
At a certain temperature, 0.920 mol of SO3 is placed in a 2.00-L container.At equilibrium, 0.170 mol of O2 is present. Calculate Kc
Heptane (C7H16) and octane (C8H18) are constituents of gasoline. At 80.0 ?C, the vapor pressure of heptane is 428 mmHg and the vapor pressure of octane is 175 mmHg.
If 0.130 mol a third gas is added with no change in volume or temperature, what will the total pressure become?
Calculate the pH after the following amounts of NaOH are added. A) 0mL NaOH added( before the titration started)
Asprin, whose structure can be found in the introduction, can be made from the reaction of a phenol and an anhydride. Give the phenol and anhydride that could be used to make aspirin?
container at a temperature of 47C exerts a pressure of 6.3 atm. Calculate the number of moles in the sample
Draw the Lewis structure of the molecule, assuming that the Cl atoms bond to a single C atom and that there is a C -C bond and two C - O bonds in the compound.
A 4.10 g nugget of pure gold absorbed 274 J of heat. What was the final temperature of the gold if the initial temperature was 27.0°C? The specific heat of gold is 0.129 J/(g·°C).
What are the structures of the products that would be expected to be obtained on hydration of 1-octyne and 2-octyne?
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