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Your unknown weak acid has a pKa of 7.21 as well as you have created your solutions of HA and A- with both having identical concentrations. If you're preferred pH is 7.55 then compute how much HA wants to be added to 50.00mL of A- to create this buffer. Provide your answer in mLs to the hundredth decimal point.
The best design for rockets is one in which both fuel materials run out at the same time to minimize excess mass. If the total mass of both components in a decaborane/oxygen rocket must be 1.951E+6g, what mass of liquid oxygen should be used
13When heated in a flame, sodium atoms emit light with a frequency of 5.09 × 1014 s-1. What is the wavelength of this radiation in nm? [Data: c = 2.998 x 108 m/s ]
Calculate the formula mass of each compound given below. Keep at least one decimal place in atomic masses from the periodic table.
Explain in one statement how EACH factor affect the rate of reaction at molecular level. Finally in no more than 2 sentences explain why the fourth factor is excluded form Arrhenius equation
Calculate the pH of a buffer formed by mixing 60. mL of 0.13 M lactic acid with 86 mL of 0.26 M sodium lactate.
Arrange the following ions in order of increasing split between the t2g and eg sets of d orbitals- that is, in order of increasing delta o.
The burning of ethane produces both CO2 and H2O. If 200 mL of CO2 is produced at 20°C and 750 torr, what volume of water vapor would be produced at 24°C and 790 torr?
a 1.0 microl sample of an equal volume mixture of 2-pentanone and 1-nitropropane is injected into a gas chromatograph.
a mixture of mgco3 and caco3 was dissolved in hcl 1.64g of a mixture of calcium carbonate and magnesium carbonate was
What is the value of the rate constant for the reaction? How much time will take the consentration to drop to one tenth of its initial value?
a solution of ethanol c2h5oh in water is prepared by dissolving 76.5 ml of ethanol density 0.79 gcm3 in enough water
Which product(s) would be obtained by the dehydration of 2-heptanol. Of 2-methyl-1-cyclohexanol
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