Mass-Mass Stoichiometry

N₂ + 3H₂ → 2NH₃

What is the mole ratio between N₂ and NH₃ in the above reaction?

Using the balanced chemical equation:

Mg + 2 HCl --> MgCl₂ + H₂

How many grams of MgCl₂ is produced if 4.67 moles of HCl react?

For the reaction $$2KClO_3 \rightarrow 2KCl + 3O_2$$ , if you start with 245 grams of $$KClO_3$$ (molar mass of KClO₃ = 122.55 g/mol), how many grams of $$O_2$$ (molar mass of O₂ = 32.00 g/mol) are produced?

For the reaction $$N_2 + 3H_2 \rightarrow 2NH_3$$ , if you start with 28 grams of $$N_2$$ (molar mass = 28.02 g/mol), how many grams of $$NH_3$$ (molar mass = 17.03 g/mol) can be produced?