Caleb wants to find out which type of floor material is best for bouncing tennis balls the highest. which statement best describes the process he should use? he should use technological design because he will need to make materials. he should use scientific investigation because he will need to do an experiment. he should use technological design because he will need to conduct background research. he should use scientific investigation because he will need to design a prototype.

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

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 many atoms are there in 5.70 mol of mg