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please explain I don't understand how to do this<Chapter 19 Exercise 19.50 with feedback 10 of 12 PartA 2Ca(s) + 02(g) - 2Ca0(s) ??,xn--1 269.8 kJASrx,--364.6 J/K Calculate the free energy change for the reaction at 26 C Express your answer using four significant figures You may want to reference Pages 784 -788) section 17.6 while completing this problem. AG kJ Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining

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