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A buffer was prepared by mixing a solution that is 0.285 M in HA and 0.385 in A-. The pH of this buffer was 4.435. Then to 405mL of this buffer solution was added to 21.5mL of 2.0 M HCL. Explain what is the pH of this new solution?
A 15.00 mL solution of KNO3 was diluted to 125.00 mL. 25.00 mL of this solution was then diluted to 1.00L. The concentration of the final solution is 0.00383M. What was the concentration of the original solution
Explain why do molecular compounds have low melting points as well as low boiling points relative to ionic substances
Does this show that they are identical structures? If not what additional TLC experiments might one perform to ascertain the identity of the unknown?
The rate constant (k) for a reaction was measured as a function of temperature. A plot of ln*k versus 1/T (in K) is linear and has a slope of -5355K . Calculate the activation energy for the reaction.
Identify the incorrect names or formulas.
hfcs hydrofluorocarbons are replacing cfcs chlorofluorocarbons because the c-h and c-f bonds are stronger than c-cl
Imagine that, instead of utilizing purecyclohexanone in the nitric acid oxidation of cyclohexanone toadipic acid you used one of those impure products. Could the cyclohexanol impurity persist as well as contaminate the adipic acid
mercury nanometer contains 2 g of Ar. A burner heats it to Pext. at 760 torr. What is the Temperature of the gas in the bulb when the total volume is 3 L and H=76mm
compound a is c4h9cl and shows two 13c nmr resonances. compound b is an isomer of compound a it shows four 13c nmr
In an experiment 0.4000moles of hydrogen gas and 0.400moles of iodine vapor are mixed in a 1.00L vessel and allowed to come to equilibrium. if Kc=49, what is the equilibrium concentration of the only product, hydrogen iodide
Calculate the molar mass of the unknown gas. (Remember that the faster the rate of effusion, the shorter the time required for effusion of 1.0 L; that is, rate and time are inversely proportional.)
What volume, in mL, of a hydrogen phosphate solution that is 85.5% hydrogen phosphate, by mass, contains 0.100 mole of hydrogen phosphate. The density of the solution is 1.70 g/mL.
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