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A solution is made by dissolving 21.5 grams of glucose (C6H12O6) in 255 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m?
This molecule has a charge of n-. By changing the overall charge, n, from 1- to 2- to 3- we get three different polyatomic ions. For each of these ions a) identify the central atom and b) determine the formal charge of the central atom, X.
What combination of a molecular base and a salt of the conjugate acid of the chosen molecular base should you select to prepare a buffer solution that would maintain a pH of 10.00?
Three manufacturers are producing carbonated bottled water. One company introduces carbonate by bubbling carbon dioxide into water until CT=10-3 M (equivalent to adding "H2CO3*" until CT = 1 x 10-3 M), a second adds sodium bicarbonate (NaHCO3) unt..
a 0.831-g sample of so3 is placed in a 1.00-l container and heated to 1100 k. the decomposes to so2 and o2
What is the color of most salts containing the copper (II) ion. the color of most salts containing the cobalt (II) ion. the color of most salts containing the nickel (II) ion
You obtain an unknown acid. You weigh out .856 grams of it and dissolve it in 45mL of water. You titrate it with 27.4mL of .5 M NaOH. What is the equivalent weight of the unknown acid
the major differences in the dehydration of an alcohol by an E1 and E2 reaction mechanism.
The graph above shows the titration curves of four monoprotic acids of varying strengths. All of the acids start out at 0.1 M concentration and 25.0 mL volume. Choose all of the correct statements about these titration curves from the choices belo..
c5h12, to Co2 and H20 is -3536.3 kJ/mol. What is the enthalpy of formation of pentane at 25 degrees celcuius?
calculate the molar mass of a nonelectrolyte that lowers the freezing point of 25.00 g of water to -3.9 degrees celsius
Consider the reaction: Mg(s)+Fe2+(aq) -> Mg2+(aq)+Fe(s) at 63 degrees celsius, where [Fe2+] = 3.50M and [Mg2+] = 0.310M. The reaction quotient, Q, for the cell is 8.86x10^-2. The temperature, T, in kelvins is 336K.
If the molar solubility of Cd3(PO4)2 at 25 oC is 1.19e-07 mol/L, what is the Ksp of Cd3(PO4)2 at this temperature
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