Calculate the number of molecules of ammonia (nh3) in 7.75 moles of ammonia.

What is driving behind plate tectonics (plate movment)? a) gravity only b) inertia c) convection and gravity d) the sun theres no option for science so i picked chemistry. plz

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?

Answer asap need by wednesday morning calculate the ph of 0.036m naoh best answer will be brainliest