Single multiple choice!?

Question

When 46.2 J of thermal energy are released from a piece of copper, the temperature of the copper decreases from 80.0°C to 20.0ºC. The theoretical specific heat capacity of copper is 0.385 J/g·°C. What was the mass of the piece of copper?
a) 6.00 g
b) 2.00 g
c) 0.273 g
d) 1.01 kg

Answer 1

pllug in joules and change in degrees into the specific heat
.385 = 46.2 /(g x 60)
rearrange algebraically
g = 46.2 /(.385 x 60)
g = 2.00
answer is b