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Question- Calculate the pH at the equivalence point for the titration of 0.10 M NH3 by 0.10 M perchloric acid. pKb for NH3=4.74; hint: consider the change in volume before and after reaction
Complete calculation is required.
Consider a lake containing 39 ppb (parts per billion) of parathion, which has a log Kow = 3.8. If a sample of lake water was mixed with octanol, what is the expected concentration of parathion in the octanol?
The company is interested in the drug's value because only the dissociated form of the chemical is active in preventing cholesterol buildup in arteries.
The maximum temperature attainable in the crucible on strong heating with a Bunsen burner is approximately 800°C. Can the magnesium evaporate under the conditions of this experiment? Why or why not?
Which of the following would produce the greatest increase in the volume of a gas sample: a. doubling the amount of gas in the sample at constant temperature and pressure, or b. raising the temperature from 244 degrees C to 1100 degrees C.
Explain what reaction occurs when sodium hydroxide is added to the stearic acid in cyclohexane and water. Define how does this change the solubility of cyclohexane in water. Does HCL reverse this reaction as well as if so why
Hydrogen has three isotopes (1H 2H and 3H) and chlorine has two isotopes (35Cl and 37Cl). How many isotopic kinds of HCl are there. Write the formula for each, and tell how many protons, neutrons, and electrons each contains.
If the heat of combustion for a specific compound is -1390.0 kJ/mol and its molar mass is 61.39 g/mol, how many grams of this compound must you burn to release 821.90 kJ of heat.
for the reaction fe2o3s 3 cog ? 2 fes 3 co2g the enthalpy change is - 6.60 kcal. on the basis of this information
An imperial cruiser fires its lasers at the rebel frigate 12X10^30 photons of 505nm wavelength slam into the frigate. The frigate was mostly constructed from high quality materials such as duranium a highly heat
How many kilojoules of heat is required to completely covert 70.0 grams of water at 66.0° C to steam at 100°C?
What types of intermolecular forces would you expect to exist among molecules of 1-butanol? (Select all that apply.)
A 0.50 sample of compound contains 0.40g of Carbon and .10g of Hydrogen. What is the empirical formula
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