Chapter 6 - Thermochemistry - Exercises - Page 287: 56

$75\text{ grams}$

Work Step by Step

By the law of conservation of energy: $mc\Delta T = -mc\Delta T$ $90.0*4.18*(37.0-22.0)=-m*4.18*(37.0-55.0)$ $m=75\text{ grams}$

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