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25.00 ml of a .250 M NH3 solution is titrated with .100 M HCl. What is the pH after 5.00 ml of HCl has been added? Kb of NH3 = 1.76*10^-5. (please show all calculations)
A solution of ethanol (C2H5OH) in water is prepared by dissolving 67.5 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
Solutions of AgNO3 and KCl are combined and 0.683 g of a precipitate are formed. What is the precipitate and how many moles were formed.
What is its volume is 2.58 cubic micrometers. a)What is its volume in cubic millimeters (mm^3)?
If a water electrolysis cell operates at a current of 8.1 A , how long will it take to generate 24.0 L of hydrogen gas at a pressure of 23.0 atm and a temperature of 25 C
A 0.3459 g tablet that contains bicarbonate generates 1.24 x 10?3 moles of CO2. What is the percent bicarbonate in the tablet? Bicarbonate is 61.0138 g/mol.
A sample of neon effuses from a container in 79 seconds. The same amount of an unknown noble gas requires 161 seconds.
Given there is an increase in volume, which increases possible microstates, how can there be no increase in entropy?
A gas occupies a volume of 380. ml at 135 °C? At what temperature will the volume of the gas be equal to 535 ml?
A 4.63 g sample of a molecular compound is dissolved in 103 g of tetrachloromethane (carbon tetrachloride). The normal boiling point of the solution is 61.51?C.
Calculate the difference in the ionization energies for 1H and 4He atoms. This result allows you to compare the effect on the ionization energy of changing the nuclear charge
Show a completely different, good way to make product B above, starting from benzene. The method should not involve halogenations of the ring.
Pinacol (2,3-dimethyl 2,3-butanediol) gives a mixture of pinacolone (3,3-dimethyl-2-butanone) and 2,3-dimethyl 1,3-butadiene by treating with acid.
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