Explain 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 15.1g . The two rings are heated to 69.3?C and dropped into a 13.5mL of water at 20.8?C. When equilibrium is reached, the temperature of the water is 23.0?C.

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

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

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