Trees obtain carbon from a. decaying organisms b. sunlight c. the atmosphere d. none of the above select the best answer from the choices provided a b c d

C

Explanation:

Trees take up carbon dioxide from the atmosphere and reduce to make carbohydrates. This  is powered by the energy of the sun that is taped by chlorophyll pigments during photosynthesis. The energy is used to split water molecules into H+ and O2-. Then the following chemical reaction ensues;

6CO2 + 6H2O > C6H12O6 + 6O2

i believe the answer is c

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.