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Explain how much of the caspase inhibitor, Ac-DEVD-CHO (M.W. = 502.47 g) should be weighed out and added to 5 ml of water to make a 1mM stock solution?
Explain how much theophylline should be weighed out? To do the experiment with one rat, the developmental biologist needs to make 500 ml of a 100 uM theophylline solution (M.W. 180.17
What is the minimum quantity of theophylline (in grams) the developmental biologist should order from Fisher Scientific to have enough for the entire study? For an entire study, twelve rats w
Liquid heptanes, C7H16, burns in oxygen gas to yield water and carbon dioxide. Determine the minimum mass of oxygen needed for the complete reaction of the 25.5 mL of heptanes?
How do you derive the degrees of freedom for vibrational contributions at high temps to internal energy? In estimating the molar heat capacity (Cv) at constant volume of SO2(g) at 1000 K.
Describe the percentage error if you had used the equation instead of the interpolation/extrapolation. Use the equation to calculate C at t = 0 and t = 1min.
Determine the partial pressures of O2, N2, and CO2 in atm. (At constant temperature and pressure, the volume of a gas is directly proportional to the number of moles of the gas.)
Determine the ml of HNO3solution that should be made. An experiment requires 2.033 g of HNO3 dissolved to make a 6.00 N HNO3 solution to neutralize a base.
A flask contains a mixture of two ideal gases, A and B. Demonstrate graphically how the total pressure of the system depends on the amount of A present; that is, plot the total pressure versus the m
Determine the numbers of different Claisen condensation products are possible in the reaction of equal amounts of ethyl acetate (CH3CO2Et) and ethyl propionate (CH3CH2CO2Et) ?
Explain what volume of CO2 gas at 645 torr and 800 K could be formed by the reaction of the 45 g of CaCO3 according to the equation?
Determine the numbers of grams of Cl2 can be prepared from the reaction of 15.0 g of MnO2 and 30.0 g of HCl according to the following chemical equation?
Explain how to prepare 250ml of 0.6M triethanolamine buffer, pH7.2, from the free amine and concentrated HCl ?(pKa for the amine hydrochloride is 7.8)
Hydrazine N_2H_4 and ammonia NH_3 are both binary compounds of hydrogen and nitrogen. Based on the law of multiple proportions, determine the numbers of grams of hydrogen would you expec
Newton's law states that force = mass x acceleration. From these relations, derive the dimensions of Newton's, joules and Pascal's in the terms of the fundamental SI units. You also know
What is the volume of iron contained between the marks labeled 3.10cm and 3.50cm? A solid cylinder of iron of circular cross section with a radius of1.500cm had a ruler etched along its length.
Determine the numbers of grams of .491 wt% aqueous HF are needed to provide a 50%excess to react with 25.0 M of .023 6 M Th 4+ by the reaction Th 4+ + 4 F- ____>THF4 (s)?
Determine the potential of a platinum electrode immersed in a solution that is: 0.0813M in K4Fe(CN)6 and 0.00566M inK3Fe(CN)6
Discuss how to prepare 250ml of 0.6 Mtriethanolamine buffer, pH 7.2, from the free amine and concentrated HCl ? (pKa for the amine hydrochloride is 7.8)
Explain what programs or initiatives might assist in the progress toward this goal, Finally, if Phase IV of the Demographic Transition is a goal for developing countries,
The analysis is carried out in triplicate and the following results are obtained: 93.50%, 93.58%, and 93.43%. A soda ash sample is analyzed in the laboratory by titration with the HCL. Explai
Calculate if any value can be ascribed to accidental error and can be rejected at the 90% confidence level. The following sets of chloride analysis on separate aliquots of a serum were repo
Assume the diameter of the pipe is increased by a factor of 2, w/t any change in flow rate (i.e., still at 9L/Min). Explain by what factor does the mean drop size change?
How can determine the density of the aluminum rod when the initial water level in a 10 mL graduated cylinder was 5.00mL. An 8.647-g aluminum rod was placed in the graduated cylinder, and the water