Use the formula Q=m*C*change in T.
Plug in 39 for m, 4.18 for C (the specific heat capacity of water), and 12 (which is 21 - 9) for change in T.
Multiply these numbers to get your answer.
Calculate the amount of heat required to raise the temperature of a 39 g sample of water from 9 ∘C to 21 ∘C
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