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Explain how many moles of HF (Ka=6.8x10-4) should be added to water to form 0.230L of solution with a pH of 3.50?
After mixing 2.00g of H2S with 2.00g of NaOH, a 92.0% yield of sodium sulfide is obtained. Calculate the experimental yield in grams obtained in that reaction.
let's pretend a certain sterling silver ring has a mass of 31.25g. silver has 93%. determine the mass of silver found in the ring.
Calculate the heats of combustion for the following reactions from the standard enthalpies of formations listed in appendix 3
A solution is initially 2.5 x 10-3 M in Cu+ and 2.5 x 10-3 in Pb 2+. Iodine ion is gradually added to the solution. Determine the concentrations of Cu+, Pb +2, and I- at the point of maximum separation. The solubility products of CuI and PbI2 are ..
Using basic knowledge of Maxwell relations and such, can you derive a thermodynamic equation of state that can allow for the easy evaluation of this parameter
A reaction has a first order rate constant of 4.31x10-5 s-1 at 25oC and 0.00111 s-1 at 65oC. What is the value of the rate constant at 43oC
Which two electron configurations represent elements that would have similar chemical properties. (1) 1s22s22p4 (2) 1s22s22p5 (3) [Ar]4s23d104p3 (4) [Ar]4s23d104p4
three portions of the same liquid are mixed in a container that prevents the exchange of heat with the environment.
if 0.176 moles of mg have combined with 0.220 moles of o what is the empirical formula of the
A 0.15 M solution of Chloroacetic acid has a pH of 1.86. What is the Value of Ka for this acid
A sample of gas in a balloon has an initial temperature of 3degrees celsius and a volume of 1740 L. If the temperature changes to 88 degrees celsius , and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas
airbags contain a mixture of sodium azide potassium nitrate and silicon dioxide. a sensor detects a head on collision
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