To solve, you find the correct mole ratio from the given equation. The questions asks for how many moles of H2O from 2.0 moles of NH3(ammonia), so the mole ration is going to be 6:4. 6 moles of H2O and 4 moles of NH3.
<u>Tip:</u> We multiply the given with what we want divided by what we want to get rid of.
Tend tokeep the product concetration<u>low</u> and therefore drive the reaction<u>righward</u>
Explanation:
The fact the products of a reaction are quickly consumed by the next one would tend to keep the product concetration low and therefore drive the reaction righward (to the products).
This happens because the system will not achive equilibrium between the reactants and the product, and will keep producing it util the system achives equilibrium or the reactants dry out.