A 150 G Piece of Iron (C_P = 25

A 150 g piece of iron (C_P = 25.09 J/(mol .°C) ) was heated to a temperature of 47°C and then placed in contact with a 275 g piece of copper at 20°C (C_P = 25.46 J/(mol .°C) ) . What was the final temperature of the two pieces of metal?

A) 25°C
B) 20°C
C) 30°C
D) 47°C
E) 33°C