I think the answer is c since the it’s looking at NW, the wind is coming from SE
Atomic mass number is the number of protons and neutrons. Subtract 80-35=45 is the number of protons. Because the atom is neutrally charged, the number of protons must equal the number of electrons, so there are 45 electrons.
Answer:
C3H8 +5O2 arrow 3CO2 +4H2O
The answer of this answer is given in the attached file