A heavily wooded area needs additional solar collectors to meet energy demand. Which statement describes a possible environmental consequence of adding these collectors? A. Trees will need to be cleared for the solar collectors to work efficiently.

B. The amount of air pollution will increase.

C. The amount of water pollution will increase.

D. More trees will need to be planted to insulate the solar collectors.

The continuous release of nuclear energy caused when one fission reaction triggered more nuclear reactions is a

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.

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules