43. A box is 1 m high, 2.5 m long, and 1.5 m wide, its volume is 5 m?. 44. 450 km is equivalent to 4.5 m.

45. Weight is the mass per unit volume of a material.

46. A rope is 440 cm long. It is 44 mm long.
all true or false

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.

What are the similarities of physical and chemical change ?

Tell me the iupac name of the following compounds: