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Question about Combinatorial synthesis of a series of esters
1. Why are the crude ester mixtures washed with aqueous NaHCO3?
2. You wish to test 9 esters for antitumor activity. One and only one of the 9 esters will actually have antitumor activity. You will prepare the esters from an alcohol and an acid as was done in the lab experiment here. However, you will prepare mixtures containing 1 alcohol and 3 acids or mixtures containing 1 acid and 3 alcohols. How many mixtures will you need to prepare to find the 1 antitumor compound? How many of these mixtures will exhibit antitumor activity? Hint: You should construct a deconvolution table similar to the one shown below.
3. If the experiment performed in question 2 gave exactly 3 mixtures with antitumor activity, how many of the 9 esters would be antitumor agents?
Calculate the heat released when 2.00L of Cl2(g) with a density of 1.88 g/L react with an excess of sodium metal as 25°C and 1 atm to form sodium chloride. [H°f(NaCl) = -411.0 kJ/mol
What is the pH of the solution when the hydronium ion + concentration of 0.15 M CH3COOH is 6.3 × 10.
A solution is made by dissolving 0.0350 mol of HF in enough water to make 1.00L of solution. At 24°C, the osmotic pressure of the solution is .975 atm.
a student titrates 50.0ml of apple juice and reports the following in the titration to the phenolphthalein end point with 0.1011 M NaOH.
can you find out the name and formula of the unknown compound and determine the identity of the element?
a 7.95 L Container holds a mixture of two gases at 37 degrees celcius. the partial pressure of gas A and gas B, respectively, are .287 atm and .698 atm. if .210 mol a third gas is added with no change in volume or temperature.
Isotopes Decay, Isotopes decay according to first order kinetics with a predictable half life
Calculate the molar concentration of OH- ions in a 0.550 M solution of hypobromite ion (BrO-; Kb=4.0 x 10^-6). What is the pH of this solution?
Consider a glass of 171 mL of water at 29°C. Calculate the mass of ice at -15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved.
Given the tabulated data, what is the lattice energy of crystalline calcium chloride?
when the cations Na+ K+ Cs+ are combined with chloride ion in the gas phase to form ion pairs, which pair formation releases the greatest amount of energy? KCL or RbCl, or NaCl or CsCl.
How can diacetylmorphine be ionised in the blood and what will the effects of this be on the molecule in circulation? (I assume that it will be more soluble?)
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