When you combine sulfuric acid with sugar, you will obtain a reaction. Watch the video segment "Candy Shop" with the sound off. This video segment shows the reaction between sulfuric acid and sugar. Describe when you know that the initial chemical reaction has taken place, and describe further changes and how you know that they are occurring.

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.

Identify the electromagnets with poles that are reversed from the electromagnet shown above

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?