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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).
How much sodium nitrate (NaNO3), in grams, should be added to water to prepare .05L of solution with a molarity of .25M?
You prepare a suspension by dispersing 20.0 g solid compound with the aqueous dispersant (outer phase of the suspension) to a final volume of 100.0 ml. The dispersant contains 10% w/v glycerol and 0.5% w/v polysorbate 80. The density of the solid ..
How is the equilibrium yield of C6H12O6 affected by each of the following? 6 CO2(g) + 6 H2O(l) + HEAT C6H12O6(s) + 6 O2(g) (a) increasing PCO2 increases decreases no effect
A certain reaction has an activation energy of 60.0 kj/mol and a frequency factor of A= 3.10×1012 M^-1s^-1 . What is the rate constant k , of this reaction at 30.0 Deg celsius?
The molecular mass of an unknown compound was determined by measuring the freezing point depression of an aqueous solution of the compound
Which of the following buffers will have the lowest pH?
an oxygen-oxygen bond has an enthalpy of 498 kj/mol , and the standard enthalpy of formation of CIO2(g) is DH f=102.5 kj/mol , use Hess's law to calculate the value for the enthalpy of formation of CIO (g)
When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 13.0 oz drink from 74 degree F to 31 degree F
For the reaction above, how much would be liberated by the combustion of 5.00g of iron metal in excess oxygen.
What is the volume of 1.5 mol of nitrogen gas at 0.5 atm of pressure and 58 degrees celsius
A student who suspected he had a carbonyl compound for an unknown dissolved his solid unknown compound in acetone and the solution was analyzed by IR
Determine the number of bonding electrons and the number of nonbonding electrons in the structure of SI2. Determine the number of bonding electrons and the number of nonbonding electrons in the structure of CO2.
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