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A weather report gives a current atmospheric pressure reading of 546.5 mm Hg. Express this reading in atmospheres.
A copper cathode with an initial mass of 10.77 g is placed in a solution of CuSO4. After current has passed through the electrode for 15.0 minutes the cathode has a mass of 12.89 grams. Determine the amount charge (in Coulombs) that has passed thr..
Sketch an approximate titration of an NaOH solution with standardized HCl solution. Briefly explain the shape of the curve before the equivalence point, at the equivalence point, and after the equivalence point.
Draw structural formulas for propanal and propanone. From these formulas, do you think that aldehydes and ketones are isomeric with each other. Show evidence and substantiate your answer by testing with a four carbon aldehyde and ketone.
In a chemical reaction two water-soluble ionic substances react to form an insoluble solid precipitate in a metathesis reaction. Would you expect DS to be positive, negative, or close to zero for this reaction
A Balloon with a volume of 2.00 L is at a pressure of 1.5 atm and a temperature of 20C. If the balloon is put into a container and the pressure is increased to 2.0 atm and the temperature is raised to 25C, what is the new volume of the balloon?
Calculate the pressures in the flask in parts a and b (in torr) if the atmospheric pressure were instead 675 torr.
A radioactive sample contains 1.85 g of an isotope with a half life of 3.5 days. What mass of the isotope will remain after 5.8 days. (Assume no excretion of the nuclide from the body) M=?
a certain anesthetic contains 64.9 percent carbon 13.5 percent hydrogen and 21.6 oxygen by mass. determine the
Individual bonds in a molecule are often polar, molecules as a whole also often are polar because of the ne tsum of individual bond polarities. Which of the following molecules is/are polar? SF4, CCl4, C2H2.
Calculate the number of bromine molecules present in the flask if A flask contains 0.350mol of bromine, Br2 in liquid form .
Why would it be more appropriate to put the elements La and Ac in the bottom two periods and put Lu and Lr in the transition metals? Why don't we see the use of any sublevels higher than the f sublevel?
a solution is prepared by mixing 50.0 ml of 0.50 m pbno32 with 50.0 ml of 1.7 m kcl. calculate the concentrations of
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