Question

The temperature of a chemical solution is originally 21, degree, C. A chemist heats the solution at a constant rate, and the temperature of the solution is 75, degree, C after 12 minutes of heating.

Answer 1

Assuming the question is "at what rate did the chemist heat the solution," the answer is the chemist heated the solution at +4.5 degrees Celsius per minute.

75-21=54

54/12=4.5