Place the following in order of increasing acid strength.
hbro2 hbro3 hbro hbro4
4)
a) hbro4 < hbro2 < hbro3 < hbro
b) hbro2 < hbro3 < hbro4 < hbro
c) hbro < hbro2 < hbro3 < hbro4
d) hbro2 < hbro4 < hbro < hbro3
e) hbro < hbro4 < hbro3 < hbro2

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.

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear

What human activity increases beach erosion?