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An element crystallizes in a body centered cubic lattice. The edge of the unit cell is 3.47 Å, also the density of the crystal is 7.98 g/cm3. Compute the atomic weight of the element.
50.0 mL of 1.0 M HCl at 25.0 oC were mixed with 50.0 mL of 1.0 M NaOH also at 25.0 oC in a styrofoam cup calorimeter. After the mixing process, the thermometer reading was at 31.9 oC.
Bromothymol blue is a common acid-base indicator. It has a Ka equal to 1.6 x 10^-7. Its un-ionized form is yellow and its conjugate base is blue. What color would a solution have at pH = 5.8
1. why should the funnel be removed from the top of the burette while titration is being berformed?2. while the
use the cahn-ingold-prelog sequence rules to differentiate between e- epposite and z- zame zide olefins. differentiate
Calculate the percent ionization of formic acid (HCO2H) in a solution that is 0.311 M in formic acid and 0.189 M in sodium formate (NaHCO2). The Ka of formic acid is 1.77 × 10-4.
A 52.0mL volume of 0.35M CH3COOH (Ka=1.8x10^-5) is titrated with 0.40 M NaOH. Calculate the pH after the addition of 31.0mL of NaOH.
An enzyme preparation from isolated beef liver mitochondria has the capacity to carry out all of the reactions of the tricarboxylic acid cycle when supplied with the essential precursors of acetylCoA, NAD+, FAD, GDP, and Pi2-.
Consider following cell. SCE stands for the saturated calomel reference electrode, which has a fixed potential of 0.244 volt. Pt|VOSO4 (0.0824 M), V2(SO4)3 (0.395 M), HClO4 (0.0100 M) || SCE Calculate the cell potential.
A strong broad IR stretching band at about 3500 Cm-1 along with several narrow aromatic bands around 1600 and 1500 Cm-1 suggests the presence of what class compound?
Classify the following solutions as saturated, unsaturated, or supersaturated, based on your graph. Note that c. and d. require you to convert from the concentrations give to g/100 g H2O before you refer to the graph.
calculate the ph at the equivalence point for the titration of 0.20 m aniline c6h5nh2 kb 3.8 x 10-10 with 0.20 m hcl.
How could you ascertain wheter the alcohol or the carboxylic acid furnishes the hydroxyl group that appears in the molecule of water
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