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It takes 78.2 J to raise the temperature of 45.6 g lead by 11.3 degrees C. Calculate the specific heat capacity of lead
a sample contains both KBr and KI in the unknown quantities. If the sample has a total mass of 5.00g and contains 1.51g K, what are the percentages of KBr and KI in the sample by mass?
The molecular weight of vincristine, a pharmaceutical drug, is 923.04. It is supplied in 1 mg per vial. You want to treat your culture cells with a final concentration of 5 hM vincristine and will need 30 ml of cells for your experiment
the normal boiling point of ethanol is 78 degrees celsius. if the vapor pressure of ethanol is 13.3 kpa at 34.9 degrees
Calculate the entropy of unfolding of lysozyme at 25 oC, given that the difference in PCof unfolding is 6.28 kJ/mol/K at both 25 oC and 75 oC. Hint: consider a path of 25 oC (folded)?75.5 oC(folded) ?75.5 oC(unfolded) ?25 oC(unfolded).
Why adding distioled water to the vinegar sample prior to beginning the titration does not affect the result of your determination of the molarity
The total molarity of acid and conjugate base in this buffer is 0.100 M . A student adds 9.00 mL of a 0.290 M Hcl solution to the beaker. How much will the pH change. The pKa of acetic acid is 4.760.
Germanium forms a substitutional solid solution with silicon. Compute the weight percent of germanium that must be added to silicon to yield an alloy that contains 4.43 × 1021 Ge atoms per cubic centimeter
what is the actual amount of magnesium oxide produced when excess carbon dioxide reacts with 42.8 grams of magnesium metal?
Why does it take significantly stronger magnetic and electrical field strengths to move the beams of alpha particles compared with the beams of electrons (beta particles)
What compound could be added to a 0.10 M KC2H3O2 solution to make it an effective buffer. Also, write a balanced chemical reaction for the addition
Much commercial hydrochloric acid is prepared by the reaction of concentrated sulfuric acid with sodium chloride:
Which of the following is the best reason as to why the strands of a DNA molecule are more easily separated at pH > 11. A) At pH 11 the cross-strand negative charge repulsion becomes so strong that the two strands are much more easily separated.
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