Answer:
Sun it is the sun bcz the Sun is the major source of energy for organisms and the ecosystems
2 atoms of Al
3 of S
4*3=12 of O
so total= 17
Answer: The molecular weight of the gas 28. The gas is probably N2
Explanation:Please see attachment for explanation
Subscripts cannot be changed because they are the ratio of the amount. And as we know, in a chemical equation/reaction, mass cannot be created nor destroyed. Therefore, we cannot change subscripts, however, we could change coefficients. <span />