Reply to "such a quantity"

Hi, Navi,

Although we have been taught that "amount" can only be used with noncount nouns, I think it does work with "chemicals" here, but "chemicals" is to be understood as a mixture of chemical substances. As a matter of fact, "amount" sounds to me as identical in meaning to "quantity," with "chemicals" being treated as a whole or as a "mass," as you say.

Instead, "number" would give the idea of variety, a concept I find to be absent in "amount" and "quantity." If we use the word "number," we get the idea of individual chemical substances contaminating the water.

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