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Consider a glass of299 mL of water at30°C. Calculate the mass of ice at -15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved. To find the mass of water use the density of water = 1.0 g/mL..
Given that the partition coefficient for a solute is K in a water-ether solvent extraction system, is it more effective to do one extraction with V mL of ether or three extractions with V/3 mL of ether
Calculate the molality of a 0.052 M solution of ethyl alcohol in water at 25 degree Celsius. (assume the density of the solution at such low concentration is equal to that of water at 25 degree Celsius,0.997 g/mL.)
a. finance is a very challenging and rewarding field. it is exciting area because financial managers are given the
Calculate the expansion work done against a constant external pressure of 0.979bar and at a constant temperature of 18°C.
calculate the number of gramso f magnesium that can be produced by suipplying 1.00 F tot he electrode.
Explain why BaCO3 is soluble in aqueous HCl, but BaSO4, which is used to make the intestines visible in X-ray photographs, remains sufficiently insoluble in the HCl in a human stomach so that poisonous barium ions do not get into the bloodstream.
How many mL of 1.183 M H2SO4 must be added to 18.22 mL of 0.531 M NaOH to just completely react all of the NaOH according to the equation
The following five beakers, each containing a solution of sodium chloride (, also known as table salt), were found on a lab shelf
a gas-filled balloon having a volume of 2.50 l at 1.2 atm and 25degc is allowed to rise to the stratosphere about 30 km
Compute how many ml of C2H3NaO2(0.2 M) need to be added to 200 mL of 0.1 M CH3COOH to make a buffer of pH 5 and also find out what would be the total concentration of C 2 H 3 O 2 be in this (acetate + acetic acid) solution ?
The molar mass of a volatile substance was determined by the Dumas-bulb method. The unknown vapor had a mass of 0.852 g, the volume of the bulb was 356 cm3, pressure 755 torr, and the temperature 88°C. Calculate the molar mass of the unknown vapor..
Calculate the average formal charge on an oxygen atom in the structure of the phosphate ion that minimizes formal charges, such as demonstrated in Part A.
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