When the equation fe + o2→fe2o3 is balanced, the coefficient for o2 is:

a. 4
b. 3
c. 1
d. 2 d?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Which process transfers heat from inside earth to its surface? convection currents in mantle pulling away of tectonic plates drawing in of tectonic plates convection currents in crust