The reaction of acid chlorides and anhydrides with amines both require two equivalents of the amine, but for different reasons. why is this?

explain which one is correct and why?

1) acid chlorides are less reactive than anhydrides, so more amine is needed to speed up the reaction

2) the second equivalence of the amine deprotonates the carboxylic acid generated in the reaction of an amine with an anhydride

3) the second equivalence of the amine deprotonates the amide generated in the reaction of an amine with an anhydride

4) cl− can efficiently deprotonate amides while carboxylate anions are too weak bases for this

n2(g) + 3h2-> 2nh3(g)   this is the balanced equation

note the mole ratio between n2, h2 and nh3.   it is 1 : 3 : 2   this will be important.

moles n2 present = 28.0 g n2 x 1 mole n2/28 g = 1 mole n2 present

moles h2 present = 25.0 g h2 x 1 mole h2/2 g = 12.5 moles h2 present

based on mole ratio, n2 is limiting in this situation because there is more than enough h2 but not enough n2.

moles nh3 that can be produced = 1 mole n2 x 2 moles nh3/mole n2 = 2 moles nh3 can be produced

grams of nh3 that can be produced = 2 moles nh3 x 17 g/mole = 34 grams of nh3 can be produced

note:   the key to this problem is recognizing that n2 is limiting, and therefore limits how much nh3 can be produced.

a graduated cylinder.

explanation:

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