Question

How many grams of magnesium can be heated to raise the temperature 45 C and absorb 843 J of energy

Answer 1

Step-by-step explanation:

You will need the specific heat of Mg which I found to be 1.02 J / (g C)

m * 45 C * 1.02 J . (g C) = 843

m = 843 / (45* 1.02) = 18.4 g of Magnesium