Does anyone have any idea what the answer could be for these?

Models are non-visual ways of coummincating how someone thinks about something in the natural world

Aplant may open end close its stomata to prevent excess water loss and maintain

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?