2h2 + o2à2h2o
how many water molecules are created when 32 grams of oxygen react completely with 4 grams of hydrogen?
a. 2
b. 20
c. 6.02 × 1023
d. 1.2 × 1024

A. 2 because for every 2 hydrogen atoms, there is 1 oxygen atom in water. If you have 4 hydrogen atoms, only 2 oxygen atoms can completely react with them.

They did not study the continental drift

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later