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Hi, I know that PLA is a polyester but I cannot workout and explain why it is. Can someone please explain in detail how PLA is a polyester?? I am not sure how it can be as it is formed by many carboxylic acids joined together I think with no alcohol. I am really confused could someone help...

I need to explain how a silver oxide/button cell works in relation to its chemistry. I cannot find for the life of me any useful information on this, could someone please help!!