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Cells are biomolecular engines. Considering the groups of chemicals listed below, which are the main ones that make up the cell?
A solution of a weak acid, HA, is prepared by dissolving 4.8 mmol of HA in 10.0 liters of a solution.The following values of absorbances were measured in a 1.0 cm cell in various buffers.
Calculate the change in entropy when one mole of ice at ?10.0°C and 1 atm is converted to liquid water at ?5.0°C and 1 atm
Ruthenium red can be used as a tissue stain for microscopy. It contains 38.56% ruthenium by mass. If each molecule of ruthenium red contains 3 ruthenium atoms, what is the molar mass of ruthenium red
Demonstrate how you could prepare each of the following compounds from Propene and any necessary organic or inorganic reagents.
Why does the positive potential superimposed with an AC current allow high mass particles to pass through the quadrupole
An open-end manometer containing mercury is connected to a container of gas. The mercury in the arm attached to the gas is 13.6cm higher than the one open to the atmosphere.
Low-melting solids often "oil out" of a recrystallization solution rather than crystallizing. If this were to happen, how would you change the recrystallization procedure to ensure good crystals
t-butyl bromide was dissolved in formic acid, H2CO2H, and incubated for to hours at 25oC for two hours. (A) Draw the structure of the product that formed.
A beaker with 170 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 8.70 mL of a 0.370 M HCl solution to the beaker. How much will the p..
hydrogen sulfide ion hs- is a weaker base than ammonia nh3. when ammonia reacts with hydrosulfuric acid h2s what
If 1.35 g of silver nitrate is dissolved in 115mL of water, and to this solution is added 5.00 mL of 1.45M hydrochloric acid resulting in the formation of a precipitant. Find the concentration of silver ions remaining in solution.
the average ph of precipitation in rural areas is 6.80. assuming that the phnbspis controlled by the carbonate system
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