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What would happen if a solid was dissolved in a liquid at 100 degrees and then the temperature dropped to 70 degrees?
What is the pseudoformula of ascorbic acid, given that ascorbic acid contains 3.41 mol of carbon, 4.53 mol of hydrogen, and 3.41 mol of oxygen
Determine the energy of a photon of each of these wavelengths. Which photon possesses more energy, the red or the purple
Another wood sample prepared from an object recovered at an archaeological excavation gives a decay rate of 0.177 disintegration per second per gram of the sample. What is the age of the object
a mixture of 2- percent ammonia 55 percent hydrogen and 25 percent nitrogen by a volume 9.8 newton per square meter. what is partial pressure of ammonia?
A close chemical relative of the banned insecticide DDT is methoxychlor (C16H15Cl3O2). Methoxychlor is currently used as a home insecticide. Calculate the mass percent of oxygen in methoxychlor.
For the reaction A + B C, the rate constant at 215 degrees C is 5.0 X 10^-3 and the rate constant at 452 degrees C is 1.2 X 10^-1 a) What is the activation energy in kJ/mol?
A flask contains 0.430 of liquid bromine, . Determine the number of bromine molecules present in the flask
a sample of a solid of 29.19 grams is placed in a flask. toluene is added to the flask toluene in which the solid is
At a certain temperature, the reaction PCl5(g) PCl3(g) + Cl2(g) has an equilibrium constant Kc=5.8*10^-2. Calculate the equilibrium concentrations if the initial concentrations [PCl5]=2.00M,[PCl3]=.100M, [Cl2]=0.040M
The reaction H2 + O2 + N2 ? NO + HNO + H is shown to have the following rate behavior: Rate (M/s) [H2] (M) [O2] (M) [N2] (M) 0.0028 0.2 0.4 0.2 0.0028 0.4 0.4 0.2 0.0056 0.4 0.4 0.4 0.0056 0.4 0.8 0.4 a) What is the rate law for the reaction. b) W..
A sodium hydroxide solution is prepared by dissolving 4.0 g NaOH in 1.00 L of solution. What is the molar concentration of OH- in this solution? What are the pOH and the pH of the solution?
Small helium-neon lasers emit 2.94 mJ/s of light at 634 nm. How many photons does such a laser emit in one minute?
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