. What type of packaging is used for milk? How do the physical and chemical properties of each packaging type help create a new and better product? (Material, reactivity, shape, hardness, color) What is the relationship between reactivity of material type chosen and element position in the periodic table? Discuss the importance of a package on human health. Explain – Aluminum is a highly reactive metal, why is it used for making cooking utensils?

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

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 two types of chemical bonding in the source of dietary potassium