Given their electronegativity values, which pair of atoms could form a covalent bond? A. O (3.5) and CI (3.0)
B. Mg (1.2) and O (3.5)
C. F (4.0) and Li (1.0)
D. Al (1.5) and F (4.0)

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 property of water causes water drops to bead on a freshly waxed car?

What is the mass of 0.750 mole of aluminum oxide, al2o3?