3. A 4.0 g sample of iron was heated from 0°C to 20.°C. It absorbed 35.2 J of energy as heat. What is the specific heat of this piece of iron?

a. 2816 J/(g•°C)
c. 2.27 J/g
b. 2.27 J/(g°C)
d. 0.44 J/(g.°C)

i know that the answer is D. but I need an explanation please ! :)

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.