How many milliliters of water at 23 °C witha density of 1.00 g/mL must be mixed with 180 mL of coffee at 95 °C so that the resulting combination will have a temperature of 45 °C? Assume that coffee and water have the same density and the same specific heat (4.184 J/g°C). (write the answer without decimals) Answer: 613

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