### How to produce liquid water at 60°c

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Q. A certain organ pipe, open at both ends, produces a fundamental frequency of 256 in air.If the pipe is filled with helium at the same temperature, what fundamental frequency will it produce? Take the molar mass of air to be 28.8 and the molar mass of helium to be 4.00 .

Q. What mass of steam at 100°C must be mixed with 170 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 60°C?

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