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Which of the following below applies to the addition of nucleophiles toalpha, beta-unsaturated carbonyl compounds?
1) The nucleophile can attack either at the carbonyl C atom or else at the beta C atom as both of these have a partial positive charge.
2) Nucleophilic attack at the beta C atom will defer the so-called Michael addition product.
3) Both 1 and 2.
4) Neither 1 nor 2.
Silver has two naturally-occurring isotopes with masses of 106.905092 amu and 108.904756 amu. What are the percent abundances of each isotope, respectively?
What is the pH of the solution that results from the reaction of 120mL of 0.40 M HF(aq) with 120mL of 0.40 M KOH(aq) at 25 degrees C? Ka for HF is 7.2*10^-4.
A buffer is prepared by adding 11.0 g of ammonium chloride to 250 ml of 1.00 M solution...What is the pH of this buffer
An experiment requires 45.8 g of ethylene glycol, a liquid whose density is 1.114 g/mL. Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder.
What is the pH of buffer that consist of 0.20 M NaH2PO4 and 0.40 M Na2HPO4? Ka=6.2x10^-8
Silver has only two naturally occurring isotopes 107ag with a mass of 106.90509 amu and an abundance of 51.84% and 109 ag with a mass of 108.9047 amu. calculate the atomic mass of silver.
there are 4 catalysts and mechanisms. is there a pattern? what key intermediate would you observe for most of these catalysts? how are they significant?
Calculate the change in pH caused by adding 10.0 mL of 3.30-M HCl to 440. mL of each of the following solutions.
what is ture when equal masses of a and b are reacted?
When aluminum reacts with concentrated hydrochloric acid, hydrogen gas evolves. The hydrogen is collected by displacement of water at 22ºC at a total pressure of 750 torr.
What is the balanced net ionic equation for precipitation of CaCO3 when aqueous solutions of Na2CO3 and CaCl2 are mixed
a mixture of 2.00 moles of h2 3.00 moles of mh3 4.00 moles of co2 and 5.00 moles of n2 exert a total pressure of
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