What is the mole ratio of nitrogen gas to hydrogen gas in the reaction below?
N2 + 3H2 → 2NH3

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

Word equation for k(s) +h2o(l) yield koh (aq) + h2

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon