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Which of the following substances would be most efficient per unit mass at melting snow from sidewalks and roads: glucose, sodium chloride, ethylene glycol, or calcium nitrate? Your explanation should include possible environmental impact.
what is the initial concentration of acetone, H+ and I2 in the reaction mixture. it took 120 seconds for I2 color to disappear from the reaction mixture, what was the rate of reaction.
A student determined the freezing point of pure t-butyl alcohol following the procedure given in this experiment . Because of an experimental error, the freezing point temperature that she obtained was higher than the correct value
the mixture of saltwater and ice around the ice cream bucket in the ice cream machine is at a temperature of -8.40c.
Use Coulomb's law to calculate the ionization energy in kJ/mol of an atom composed of a proton and an electron separated by 80.0 pm
When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas via the reaction CaCO3(s)?CaO(s)+CO2(g)
A compound has 2 ionizable groups, with pKas of 6.2 and 9.5. A 1.0 M solution of this compound (100 mL total volume) is found to have a pH of 6.8. A biochemist adds 60 mL of 1.0 M HCl to this solution. The solution pH is now:
What is the minimum (least negative) cathode potential (versus SHE) needed to electroplate silver onto cutlery in a solution of Ag+ and NH3 in which most of the silver ions are present as the complex Ag(NH3)2+, and the concentration of Ag+(aq) is ..
at a pressure of 1 atmosphere and a temperature of 25 degc 500 cm3 of the gas hx has a mass of 0.400 g. calculate the
What is the pH of a buffer prepared by adding 0.809 of the weak acid HA to 0.305 of NAH in 2.00 L of solution. The dissociation constant Ka of HA is of is (5.66 X 10^{-7})
Formulate a reaction mechanism to show how, with excess acetic anhydride ,2-methyl benzisoxazinone might be formed.(Hint: acetylation of the amino group should occur first). How many moles of acetic anhydride are consumed in this reaction?
what is the total volume of gases produced by the combustion of 500g of butane. assume 1 atm, temp 28 degrees C and that water is produced as a gas
How many moles of Cr(OH)3 will dissolve in 1.00 L of a solution with a pH of 4.85. (Assume the pH does not change as the Cr(OH)3 is placed in the water.) (Ksp for Cr(OH)3 is 6.7 x 10-31)
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