A certain drug has a half-life in the body of 2.0 h. Suppose a patient takes one 200. mg pill at 5:00PM and another identical pill 45 min later. Calculate the amount of drug left in his body at 7:00PM. Be sure your answer has a unit symbol, if necessary, and round it to 3 significant digits. | mg

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Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.