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It is believed that there are 1000 enzymes in an E. coli cell [~1micrometer (L) x .5 micrometer (W)]. Estimate the approximate concentration of a typical enzyme and the number of the enzyme molecules inside each cell. Make any reasonable assumption that will help you calculate the numbers (for example: 50 mg/ml total proteins with an average of 30 KDa).
Describe how would separate a mixture containing benzoic acid and a neutral substance, benzophenone. Both compounds are insoluble in water and solube in ether.
100 mL of 0.200 M HCl is titrated with 0.250 M NaOH .What is the pH of the solution at the equivalence point?Express the pH numerically.
What mass of sodium azide is required to provide the nitrogen needed to inflate a 47.0 L bag to a pressure of 1.2 atm at 47 C.
describe the underlying concepts of how laboratory activity works. descreption should be at least half page
Construct the MO diagram for planar BH3 and for pyramidal BH3. Based on your MO diagram , why is BH3 planar?
What does a yellow flame in the Bunsen burner indicate? How can this be corrected? Why use a funnel to transfer large volume of liquid from one container to another?
Determine the subunit composition of this protein from the following information: 10 points Molecular mass of the native proteinby gel filtration is 300 kD Molecular mass by SDS-PAGE
What would be the resulting molarity of a solution made by dissolving 21.9 grams of KCl in enough water to make an 869-milliliter solution?
A bone sample with 2.8 g of carbon has 17.4 disintegrations per minute. How old is the bone sample in years. What percentage of the atoms of carbon in the biosphere are C-14?
In photosynthesis, plants from glucose (C6H12O6) and oxygen from carbon dioxide and water
caclculate the number of grams of Fe formed when 0.300kg of Fe2O3 reacts.
Consider the following balanced equation: 2 N2O5 → 4 NO2 + O2. If a 5.00 g sample of N2O5 undergoes this reaction, how many grams of O2 will also be formed?
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