What is the mass of gold ring

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Question- A pure gold ring and pure silver ring have a total mass of 16.0g . The two rings are heated to 71.1?C and dropped into a 13.6mL of water at 21.8?C. When equilibrium is reached, the temperature of the water is 24.2?C.

What is the mass of gold ring? Assume a density of 0.998 g/mL for water.

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