A 38-g ice cube floats in 220 g of water in a 100-g copper cup; all are at a temperature of 0°C. A piece of lead at 96°C

[answerhappygod]

A 38-g ice cube floats in 220 g of water in a
100-g copper cup; all are at a temperature of 0°C. A piece of lead
at 96°C is dropped into the cup, and the final equilibrium
temperature is 12°C. What is the mass of the lead? (The heat of
fusion and specific heat of water are 3.33 105 J/kg and 4,186
J/kg · °C, respectively. The specific heat of lead and
copper are 128 and 387 J/kg · °C, respectively.)
kg