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The combustion of oxalis acid in a bomb calorimeter yields 2816 J g^-1 at 25 degrees Celsius. Calculate a) Delta (c) U degrees and b) Delta (c) H degrees for the combustion of 1 mol oxalic acid. (M = 90.0 g mol^-1)
a sample of nitrogen gas is collected over water at a tempature of 23.0 c. what is the pressure of the nitrogen gas if atmospheric pressure is 785 mm hg
shown to contain 12.518 g silver, 0.6970 g carbon, and 2.786 g oxygen. What is the empirical formula of the sample?
Why is modulating ligand concentration not sufficient for adequate control of signaling in an organism? Sketch a diagram of a G-protein coupled receptor cascade, and indicate the possible actions that can be taken by a cell to inhibit the signal.
In the DNA double helix, adenine forms three hydrogen bonds with thymine D) In the DNA double helix, cytosine forms three hydrogen bonds with guanine
Determine the pressure in Standard atmospheres,Torr and mm Hg units when A gauge on compressed gas cylinder reads 1500 psi ( pounds per square inch; 1 atm =14.7 psi).
What are some ways to induce recrystallization (Name 3), if your solute refuses to recrystallize after performing the required 7 steps? the seven-step recrystallization procedure
A 4.20 g nugget of pure gold absorbed 299 J of heat. The initial temperature was 22.0°C. What was the final temperature.
Write the following molecular equation, complete ionic equation, and net ionic equation for the following reactions: a) Potassium iodide and silver nitrate solutions are mixed, forming a precipitate of silver iodide. b) Solutions of potassium carbona..
The only materials on hand are 300 mL of white vinegar (5.00% by mass acetic acid, density = 1.006g/mL) and potassium acetate. How should the student proceed?
One way to make a set of solutions of regularly decreasing concentrations is to make serial dilutions of the most concentrated one. a. starting with
The vapor pressure of br2(l) at 25C is 228 mm hg. if 2.00g of br2 is usedm what is the final pressure in the flask? will there be liquid in the flask.
Explain, phenomena in terms of atomic structure and behavior. When you lightly bump into a car, why does it dent and not create a hole.
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