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A student prepared a stock solution by dissolving 20.0 grams of KOH in enough water to make 150 mL of solution. SHe then took 15.0 mL of the stock solution and diluted it with enough water to make 65.0 mL of a final solution. What is the concentration of KOH for the final solution?
Li is in row 2 of the periodic table, Na is in row 3, and K is in row 4. How do their row numbers affect how their electron configurations end.
What is the specific heat of lead if it takes 97.5J to raise the temperature of a 75.0g block by 10.1 degress celcius?
Calculate the lattice energy for the hypothetical ionic compound M2X from the information given below.
If 0.52 moles of terephthalic acid are reacted with 0.50 moles of ethylene glycol, what is the number average degree of polymerization at 90 and 100% reaction
Molecular chlorine and molecular fluorine combine to form a gaseous product. Under the same conditions of temperature and pressure it is found that the volume of Cl2 reacts with three volumes F2 to yield two volumes of the product.
What cell potential (V) would be expected under the following conditions?
Determine how long will it take for the concentration to decrease to 0.13 mol/L express your answer in seconds.
When 0.549 moles of a certain gas fill a balloon the volume is 75 mL. If enough of the same gas is added to the balloon until 1.44 moles of gas are present, what is the new volume of the balloon?
Molecules can be as small as a few atoms or as large as thousands of atoms. In 1962, Max F. Perutz and John C. Kendrew were awarded the Nobel Prize for their discovery of the structure of hemoglobin
Calculate kp and kc for the dissociation.
Naturally occurring element X exists in three isotopic forms: X-28 (27.977 amu, 92.21% abundance), X-29 (28.976 amu, 4.70% abundance), and X-30 (29.974 amu, 3.09% abundance). Calculate the atomic weight of X.
An industrial waste from a metals industry contains approximately 5*10^-3 M H2SO4. Before being discharged into the stream, the water is diluted with tap water in order to raise the pH.
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