9. Fuel cells & hydrogen (Ming) a. What is the operation principle of a fuel cell? What are the basic components of a fuel cell and their functions? What are different fuel cell types? b. How to calculate efficiency of a fuel cell? What do LHV and HHV mean? c. Explain the reactions happening in a PEMFC and a SOFC.

Q: Please I need help solving number 19 A&B

A:

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A: 25)     The compound is ESTERS(RCOOR) which provide pleasant smell to fruits.

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A: Neither step 1 nor step 2 is completely correct.