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7. If 100 grams of water at 90°C and 40 grams of water at 10°C are mixed, what is the final temperature of the mixture? (Assu
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at 90°c in = I callom c 1 lost gain by sclution - 7 ut final temperature is Heat loss by 100 grame c 100 (90-T) Heat 40 gram

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