I don't know how 5°C cooled to 85°C but the answer would be 12.878L
B. Energy from the sun carbon dioxide and water
yeah, let her b0yfriend know what she told you and you are telling him that simply because you want to avoid problems between them.
Isotopes have same atomic number or same number of protons, but different number of neutrons and mass number.
If they have same atomic number or same number of protons as the original one they are isotopes.