How many moles of nitrogen (N2) gas are required to react with 9.00 moles of hydrogen (H2) gas?

Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

How many moles of al3+ ions are in 1.25 moles of al2o3