Question

What is nitrate???????

Answer 1

Nitrate are compounds that contain a nitrogen atom joined to 3 oxygen atoms. Nitrates are used primarily to make fertilizer, but they are also used to make glass and explosives.  Its symbol is NO3 -. It can be reduced to nitrites.  
 

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Answer 2

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Nitrates are a set of compounds that involve nitrogen and oxygen molecules. While they are often associated with cured meats, green, leafy vegetables are actually much richer in nitrates.