In the equation C3H8 + O2 -> CO2 + H2O, what coefficient belongs in front of the O2 group?

How many atoms are there in 5.70 mol of mg

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers