Given the chemical reaction fe3o4 + h2 ⟶ fe + h2o, identify the coefficient of fe in the balanced equation.

Organisms within a population must compete for resources to survive

Select the correct answer from each drop-down menu. during the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?