4. What happens to solar energy that enters the Earth system? Select all
correct answers.
a. It is absorbed by the atmosphere.
b. It is reflected back into space.
c. It is completely used up by environmental processes.
d. It is completely absorbed by surfaces that have high albedo.
e. It is absorbed by Earth's surface.

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.

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form