49. Which type of precursor is used as reactant in intramolecular Claisen
condensation?
O One molecule with an ester end
O Two molecules of ester
O One molecule with two ester ends
O One molecule of ester and enolate​

C.One molecules with two ester ends

Explanation: In intramolecular Claisen condensations, reactions occur for 1,6 and 1,7 diesters, as these substances result in the formation of compounds containing five and six membered rings, respectively.

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answer: i have one answer

acids are substances that ionize (break off) in an aqueous solution to produce hydrogen (h+) ions

explanation:

hope this and sorry i could only come up with one answer!