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October 23, 2014

Homework Help: chemistry

Posted by mike on Monday, March 14, 2011 at 2:50am.

In a chemical reaction, substance A combines with substance B to form substance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a> and <img src=. At time t seconds after the start of the reaction, the quantity of Y present is y grams. For certain types of reactions, the rate of the reaction, in grams/sec, is given by
\hbox{Rate}=k(a-y)(b-y),
where k is a positive constant. 1. Sketch a graph of the rate against y. For what values of y is the rate nonnegative?

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