Answer:
sun
Explanation:
because all plants use energy from the sun to make food and grow
Answer:
100 J of energy are needed to heat the copper from 20∘C to 80∘C .
The correct Answer based on my calculations is C
31
A dalton is the same as an atomic mass unit. And an atomic mass unit is approximately the mass of a nucleon (proton or neutron) such that the mass is 1 g/mol. So in this problem you have 15 protons and 16 neutrons, so the number of daltons is 15 + 16 = 31.