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Beginning with 150.0 mL of 0.175 M ammonia, determine the solution's pH after an additional 25.0 mL of 0.400 M ammonium chloride is added to the solution (be sure to account for the change in volume at each step).
When 5.0 g of an unknown compound is dissolved in 200.0 g of carbon tetrachloride, CCl4, the freezing point of the solution is -31.8 degC. The freezing point of pure carbon tetrachloride is -22.3degC
Multiple choice questions in Radioactive Decay - electron emitted from the nucleus during some kinds of radioactive decay is known
why was Mendeleev's decision to leave blank spaces on his table sometimes was referred to as his most significant contribution to the periodic table?
An aqueous antifreeze solution is 40.0% ethylene glycol, C_2H_6O_2, by mass. The density of the solution is 1.05 g/ml. Calculate the molality of the ethylene glycol.
At what pH will this occur? Ignore complex formation and potential redox reactions.
How much of either 5.0 M HCl or 5.0 M NaOH must you add (and which one)? Assume the pka for imidazole is 7.0.
What are he experimental conditions of T and P that will be used to calculate the mass of air in the flask? B) Calculate the density of air at the experimental conditons identified in part A
what is the heat flow of hot water added to cold water? What is the heat flow of the cold water? hot water was 52.5 C the cold water was 21.7 C the final temperature was mass of cold water was 49.35g
60.0 mL of a 0.450 M solution is titrated with 0.570 M . Calculate the volume of required to reach the equivalence point.
What is the total pressure of a mixture of gases made up of CO2, O2, and H2 if the partial pressures are 2.2atm, 400mmHg and 112kPa respectively.
How many isomers of dimethylcyclohexanediol could you get from complete hydroboration-oxidation of 1,4-dimethyl-1,4-cyclohexadiene? Draw them all.
The smallest sample of carbon atoms that can be observed with the naked eye has a mass of approximately 2 x 10-8 g. Given that 1 g = 6.02 x 1023 amu,
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