When you push downward in earth to make a pole vault, earth exerts an equal force on the pole

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !

What is the enthalpy of combustion (per mole) of c4h10 (g)? –2,657.5 kj/mol –5315.0 kj/mol –509.7 kj/mol –254.8 kj/mol