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We are titrating 21.42 mL of 0.3711 M hypobromous acid (HOBr, Ka = 2.000x10?9) with 0.5076 M LiOH. What is the pH at the equivalence point?
When using 95% ethanol, the rf value for methylene blue was a lot larger than the rf value for fluorescine. Why does this happen
Consider a Carnot Cycle that operates between heat-reservoirs temperatures of 200 C and 50 C. If 200 kJ of heat is added for the first stage of the cycle, determine the (1)thermal efficiency, (2) the work done per cycle,
how many grams of mercury (II) oxide are needed to create 28.9 grams of oxygen gas?
Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to 2 significant digits.
a 100.0 ml of acetic acid solution of unknown molarity is titrated with 0.15 m naoh solution. the titration requires
list the opportunity costs of the followinga. going to collegeb. missing a lecturec. withdrawing and spending 100 from
what is the mass of the steel bar. Use the following values: specific heat of water = 4.18j/gc specific heat of steel = 0.452 j/gc Express your answer to three significant figures and include the appropriate units. mass of the steel =
The next 6 questions involve the calculation of concentrations of the molecular and ionic species in an aqueous solution that has an analytical composition of 0.060 M KH2PO4 + 0.460 M K2HPO4.
using a sample of hard water contains 121 mg of calcium carbonate per liter of h2o. suppose the reaction goes to
The energy from condensing steam water is used to melt ice at 0 degrees Celsius. How much ice can be melted by condensing 1.0 kg of H2O vapor? (Delta H fus of ice= 6.01 kj/mol) (Delta H vap of water = 40.7 kj/mol)
In the determination of the density of a cylinder of aluminum, it was necessary to measure the volume of the sample. The diameter of the cylinder was 38.2 mm and the length of the cylinder was 15.5 mm. What was the volume of the aluminum cylinder ..
A petroleum refining facility located in a suburban, but relatively populated, area converts crude oil derived from subsurface deposits into various fuels (e.g., gasoline, kerosene, heating oil, diesel) and organic solvents
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