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1. acid catalyzed hydrolysis of esters is usually better than base catalyzed hydrolysis. True or False.............2. Borane selectively reduces a carboxylic acid while it leaves an ester alone. True or False.............3. Grignard reagents add to give 1.4-products upon reaction with alpha,beta-unsaturated ketones. True or False.............4. Imines are prepared from aldehydes or ketones and secondary amines. True or False.............5. Acetals are relitively stable and are used as carbonyl protecting groups. True or False............. Answer the 5 true or false questions
Does a mutation causing a substitution of one base pair in a strand of DNA necessarily result in a new amino acid in the protein coded for that gene? Explain.
To whats volume in liters must 105 mL of hydrochloric acid containing 47.5g of HCl be diluted to make a 1.05M solution ?
Calculate the empirical formula for a chemical compound which gives the following analysis: 65.2 g scandium and 34.8 g oxygen.
A gaseous mixture contains 420.0 Torr of H2(g), 391.3 Torr of N2(g), and 79.5 Torr of Ar(g). Calculate the mole fraction, X, of each of these gases.
What volume of ethylene glycol (C2H6O2), a nonelectrolyte, must be added to 12.7 L of water to produce an antifreeze solution with a freezing point of -34.6°C? (The density of ethylene glycol is 1.11 g/cm3, and the density of water is 1.00 g/cm3.)
Consider the reaction CH3Br(aq) + OH-(aq) ? CH3OH(aq) + Br-(aq). How would each of the following changes affect the rate of the forward reaction? a) addition of OH-? b) decrease in volume of the solution
Calculate the amount of heat (calories) absorbed when 50.0g of water at 20deg. Celsius spreads over your skin and warms to body temperature, 37deg. celsius.
Suppose it was found that in an equilibrium mixture of these gases the partial pressure of NH3(g) is 24.9 atm and the partial pressure of N2 is 6.68 atm. What is the partial pressure of H2(g)?
50.50 mL of 0.116 M HF is titrated with 0.1200 M NaOH. What is the pH after 50.50 mL of base have been added? The Ka for HF is 6.8 x 10-4
Determine how many grams of Potassium Sulfate can be formed from 150.0 grams of potassium hydroxide with sufficient sulphuric acid H2SO4?
The equilibrium point is reached at 120 seconds. After 200 seconds has passed, what is the concentration of sulfates in the drinking water sample.
how many moles of gas are contained in a compressed air tank for a suba diving that has a volume of 7.0 L and a pressure of 210 atm at 25 0C .
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