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(a) Compare the electronic structures of atomic chromium and atomic selenium. In what respects are they similar, and in what respects do they differ?
(b) Chromium is a metal, and selenium is a nonmetal. What factors are important in determining this difference in properties?
A solution is prepared by adding 0.1M acetic acid and 0.01 M ethylamine to water and adjusting the pH to 7.4. What is the ratio of acetate to acetic acid. WHat is the ratio of ethylamine to ethylammonium ion
The background section describes why you want the bleach to be far in excess of the dye. State how much greater the bleach should be to be considered in large excess. If the due is 1 x 10-5 M how much can the bleach be diluted before you no longer..
Determine At what temperature will Kp 2.00? if it is given that Delta H = +57.2 kJ/mol,Kp = 0.113 at the temperature of 298 Kelvin?
The initial solution. the point at which 80 mL of the base has been added
How many mL of a 22.5% (v/v) ethanol solution would you need to measure out in order to have 12.5 mL of ethanol. (Molar mass of ethanol is 46.07g/mol
In several sentences (not a long answer, in other words, describe the source of alkenes -- how do we obtain therm. (They are very useful in synthesis of other organic compounds, of many sorts, so we need a source of them. What is it
Nitrobenzene, C6H5NO2, an important raw material for the dye industry, is prepared from benzene, C6H6, and nitric acid. When 22.4g of benzene and an excess of HNO3
Calculate the thermal energy (in J) needed to increase the temperature of a 2.4 kg piece of iron from 29.9o C to 51.2o C. The specific heat of iron is 0.449 J/g*Co. Type your answer in scientific notation using the format 8.050e-3 for 8.050 × 10-3.
Provide a structure for the following compound: C9H10O3; IR: 2400-3200, 1700, 1630 cm-1; 1H NMR: ? 1.53 (3H, t, J = 8 Hz); ? 4.32 (2H, q, J = 8 Hz); ? 7.08, ? 8.13 (4H, pair of leaning doublets, J = 10 Hz); ? 10 (1H, broad, disappears with D2O sha..
Compare alkalide ion with the neutral alkali atom - For a given alkali metal, how does the ionic radius of the alkalide ion compare to that of the neutral alkali metal atom? Explain using physical arguments.
How many kilograms of CaH2 are needed to fill a 147 L tank with compressed H2 gas at 160 atm pressure and 27 degrees C?
Explain why it is important that the glassware and reagents used in a Grignard reaction are completely dry. Write an equation that describes what happens if phenylmagnesium bromide reacts with water.
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