Limiting Reactants: on a video my teacher made, he said 4 H2 + 100 O2 = 4 H2O

However, later he said,

15 H2 + 12 O2 = 7 H2O

Wouldn’t it be 15 H2O because H2O consists of H2 and a single O atom? In the equation there are 15 H2 and 24 single O atoms. Did my teacher make an error, or did I?

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?

According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another? the volume and the shape stay the same. the volume increases to fill the new container, but the shape stays the same. the volume stays the same, but the shape changes to fit the new container. the volume and the shape change to fill the new container.

How many liters of 3.0 m naoh solution will react with 0.60 liters of 4.0 m h2so4? h2so4 + naoh → na2so4 + h2o 1.2 l 1.6 l 2.4 l 2.8 l