Which of the following represents an organic compound? O is bonded below left and right to H. S is double bonded above and left to O, and single bonded right and below to O H. Two C atoms are double-bonded together, and single bonded above left, above right, below left, and below right to H. N is triple-bonded to N.

Write a net ionic equation to show that hydrofluoric acid, behaves as an acid in water.

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

Answer explain why it is not possible to deduce a complete order of reactivity.