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Consider two DNA molecules: one 400 base pairs long, the other 800 base pairs long. Assuming that each is a rigid rod of diameter 25 Å, with a length of 3.4 Å per base pair, calculate the ratio of the electrophoretic mobilities of these two molecules using the very approximate Eq. 5.48 (U= v/E = Ze/f). Note that the charge will be proportional to the length.
Water (2290g ) is heated until it just begins to boil. If the water absorbs 4.99×10^5J of heat in the process, what was the initial temperature of the water.
For a solution having .0025 equivalents/liter total alkalinity (contributions from HCO3-, CO3-- and OH- (hydroxide)) at [H+] = 4.69E-11, what is the percentage contribution to alkalinity from CO3--?
The decay constant for strontium-90 = 0.0247y-1. if 10.0 g decay for exactly 60 years then determine how many grams of strontium-90 remain.
Rank the given solutions in aquous form from lowest to highest boiling point:
Water supply in a city is fluoridated by adding NaF. The preferred concentration of F- is 1.6ppm.calculate the amount of Naf in milligrams should be added per gallon (treated water) if the water supply is 0.2 ppm in F-?
The formal charge on the P atom is zero and It is best described with three resonance structures.
Determine How much heat energy, is needed to convert 64.0 grams of ice at -18.0 degrees Celsius to H 2 O at 25.0 Normal Temperature ? express your answer in kilojoules
Calculate the pressure of 4 g of nitrogen gas in a 1 L container at 20.0 ?C.
Calculate the mass percent of carbon in the compound and calculate What is its final temperature
Calculate the molecular rms speeds of He atoms at 10, 100, 1000 K in units of meters per second and miles per hour.
determines how many grams of glucose are in 100 mL of the final solution?
If the gas was not pure butane but 10 mole percent propane and 90 mole percent butane then determine how would the MW value be affected?
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