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In calculating the heat given off by a reac-tion in a calorimeter, you must account for heat absorbed by 1. water and calorimeter 2. calorimeter only 3. water only 4. air only #2. Which of the following state functions are extensive? I) Pressure (P) II) Temperature (T) III) Enthalpy (H)
How do you synthesized 3-bromo-3-methyl-2-butanol from 2-methyl-2-butene from the following regents: PBr3, Br2/H2O, NaBr, NaH, HBr/NaBr, Br2/hv. This a three step process.
Explain the rate of effusion of oxygen gas is twice the rate of effusion of an unknown gas under the same conditions of temperature and pressure. Explain what is the molar mass of the unknown gas?
A buffer solution is prepared by dissolving 0.075 moles of HOBr and 0.075 moles of NaOBr in 500mL of solution. Calculate the pH of this buffer. (HOBr: Ka = 2.4 * 10^-9)
How long would it take to electroplate a metal surface with 0.500 g nickel metal from a solution of Ni 2+ with a current of 4.0 A?
Draw the abbreviated structural formula of the products of the complete hydrolysis of lidocain.
"Crossed" or "mixed" aldol condensations are practical for synthesis, if one of the aldehydes (or ketones) has no alpha-hydrogen atoms. Explain.
If a 1000 kilogram sample of rock is 0.021% gold by mass. How much zinc is needed to react with the gold extracted from the rock?
Hydrogen bonds a) play an important role in the solvent properties of water b) are not involved in protein structure c) play a role in the properties of DNA, but not of RNA d) give water a lower boiling point than expected 44
At a total air pressure of 2.78 and a temperature of 25.0 , what is the solubility of in a diver's blood? [Use the value of the Henry's law constant calculated in Part A]
Gives what happens at low pH for aluminum hydroxide. A) Al(OH)3 precipitates B) Al precipitates C) Al dissolves D) Al(H2O)63+ dissolves
A chemical engineer injects limestone into the hot flue gas of a coal burning power plant to form lime, which scrubs SO2 from the gas and forms gypsum (CaSO4.2H2O). Find Kc for the following reaction
What is the pH of a solution formed by dissolving 0.100 mol of an acid with a Ka of 1.750x(10 to the -5th) and 0.200 mol of the sodium salt of the same acid in a total volume of 1.000L
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