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What ratio [CH3NH3+]/[CH3NH2] is needed to prepare a buffer solution with a pH of 8.60 from methylamine, CH3NH2, and methylammonium chloride, CH3NH3Cl? Kb of CH3NH2 = 3.7 10-4.
Which of the metals in the cymbal alloys might be able to be quantitatively measured using UV-vis spectrophotometry. Select one or more
Chlorine gas can be produced commercially by passing an electric current through a concentrated solution of sodium chloride (brine).
Draw four different Lewis electron-dot formulas for the SeO2 molecule. (HINT: One should have two single bonds, two have a single and a double bond, and one two double bonds).
How can one decompose superabsorbent polymers? That is how can one make the dry crystals smaller?
I understand that the height of a peak in NMR spectroscopy indicates the number of identical hydrogens in that particular group. But what does it mean when peak height is measured in non-H units lacking a common denominator
A particular sample of vinegar has a [H3O^+] of 1.26 x 10^-3 M. Assuming that acetic acid is the only acid that vinegar contains (Ka = 1.8 x 10^-5), calculate the concentration of acetic acid in the vinegar.
You obtain the following six measurements for the mass of water delivered by a special calibrated volumetric pipette
1.90-g sample of a large biomolecule was dissolved in 23.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
Balance the following equation in basic solution. indicate which reactant becomes oxidized during the reaction, which reactant becomes reduced
at 25 C and 1.0 atm, .25 g of a gas dissolves in 1.00L of water. what mass of the gas dissolves in 1.00L of water at 25C and 3.0 atm
The density of an 40.0% w/w ethanol (C2H5OH) solution is 0.935 g/mL. What mass of ethanol does 225.0 mL of this solution contain
Calculate the percent ionization of 8.0×10?2 M lactic acid (Ka = 1.4x10^-4) Calculate the percent ionization of 8.0×10?2 M lactic acid in a solution containing 4.5×10?3 M sodium lactate.
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