PLEASE HELP I may just need the Element name and I can figure out the rest

A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?

Determine the maximum r-value of the polar equation r =3+3 cos 0

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot