PLEASE HELP ASAP!! Your response should be 3-5 sentences minimum with justification for your answer.

“Scientists have known for decades that humans were changing the global climate, but CO2 levels continue to rise every year. Why is it so difficult to reduce CO2 emissions? And what are the most promising solutions?”

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.

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

Determine the empirical formula for succinic acid that is composed of 40.60% carbon, 5.18% hydrogen, and 54.22% oxygen.