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At a certain temperature a reaction that follow first order kinetics has a rate constant of to be equal to 2.5*10^-3 s^-1 the time in seconds required for the reaction to be 60% complete is
A sample of a fluorocarbon gas was allowed to expand to twice its volume. In this reversible, adiabatic expansion, the temperature dropped from 298.15K to 248.44K. assuming the gas acts ideally during the expansion, estimate Cv for one mole
Each of four compounds shown has one signal in the aromatic region and one signal in the alkyl region of its H NMR spectrum. Use the integral values to determine which compound's H NMR spectrum is shown below
Write the mechanism for the aldol condensation of two molecules of propanal
If an athlete weighs 133lb and has 15.0\% body fat by weight, how many pounds of fat does the athlete's body contain
You and your lab partner take melting points of the same sample. You observe a melting point of 101-107°C, while your partner observes a value of 110-112°C. Explain how you can get two different values with exactly the same sample.
A point mass rotates in a circle with l = 2. Calculate the and the possible projections of the angular momentum on an arbitrary axis.
What is the pH of Na3PO4. While this is a triprotic species, you may ignore two of the Ka's and concentrate on the single Ka that is appropriate for this problem.
After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment, you determine the temperature of the mixed portions of water to be 45 oC. What is the heat capacity of the calorimeter. Assu..
when sulfuric acid is a component of polluted air it chemically attacks statues memorials and monuments made from
Dr. Goodchem, while searching for the cure to cancer, found a solution that contained taxol. He found that the the concentration of taxol in ether was 27 g/100 ML ether. He found that the concentration of taxol in water was 0.75 g/100 mL H2O.
What volume is needed to obtain each of the following amounts of solute? Express the answer with the appropriate units
The labels of bottles that contain barium hydroxide, hydrochloric acid and sodium carbonate had fallen off. When the contents of the bottle A were mixed with B's Contents, a white precipitate formed, A with C yielded a gas and B with C gave heat.
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