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A chemistry student needs of 40 ml chloroform for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of chloroform is 1.48g x cm^-3 . Calculate the mass of chloroform the student should weigh out.
calculate the change in entropy that occurs when 18.53 g of ice at -10.7°C is placed in 54.05 g of water at 100.0°C in a perfectly insulated vessel.
Some of the best laboratory vacuum systems can pump down to as few as 9.0 multiplied by 109 molecules per cubic meter of gas. Calculate the corresponding pressure, in atmospheres, assuming a temperature of 25°C.
an empty vial has a mass of 67.77 g. if the vial has a mass of 244.56 g when completely filled with liquid carbon
In which of the processes described below should the entropy increase. Choose ALL of the correct possibilities. A) ice cubes melting at -5 oC and 1 atm pressure
Calculate the van't Hoff factor (i) for this solution. 2. Calculate the vapor pressure at 25 ?C of an aqueous solution that is 5.80% NaCl by mass.
Calculate the pH during the titration of 10.00 mL of 0.400 M hypochlorous acid with 0.500 M NaOH. First what is the initial pH (before any NaOH is added). The Ka for HOCl is 3.0 x 10-8 M. 2.What is the pH after 2.40 mL of NaOH are added
The initial temp of the calorimeter is 21.5 degrees celcius. the H2o is initially 98.1 degrees celcius and final temp of both the H2o and calorimeter is 39.2. Calculate the heat capacity in units of J/c. Use 4.184 j/g for specific heat of water
A 25.0mL sample of HCl solution is titrated with a 0.139 M NaOH solution. The equivalence point is reached with 30.2 mL of base
Find the fraction of association of 0.100 molar solution of Hydrazoic Acid. Ka = 2.20x 10^-5.
If 5.0 g of H2 are reacted with excess CO, how many grams of CH2OH are produced, based on a yield of 86%?
Which of the following reactions involves neither oxidation nor reduction?explain
a solution is prepared by mixing 50.0 ml of 0.30 m pbno32 with 50.0 ml of 1.4 m kcl. calculate the concentrations of
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