100 grams of hot water at 80 °C is combined with 50 grams of cool water at 20 ºC. What is the final temperature in ºC of the combined water?

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Q: A block of graphite weighing 13.0 g is heated to 64.7 °C in boiling methanol. It is then dropped…

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Q: 500 grams of hot water at 90°C or

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