Benzene is a hydrocarbon that is added to gasoline to increase the performance. If the density of benzene is 0.8786 g/ cm3, what is the volume of 45.0 g benzene?

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.

How are isotopes of the same chemical element alike? how are they different?

Stage in which a star’s outer layers have started to cool and grow outward?