1. Using https://phet. colorado. edu/sims/hmtl/reactants-products-an d-leftovers/latest/reactants-produc ts-and-leftovers_en. html go to Molecules and select Make Ammonia. Simulate and describe how many molecules of ammonia (NH3) can be created when two molecules of nitrogen (N2) are combined With 4 molecules of hydrogen (H2)? Include a screenshot of the result of the investigation with your answer. 2. How many total hydrogen molecules are needed for reaction in #2, so that there are no N2 or H2 left overs- show a screenshot. What is the smallest ratio of nitrogen to hydrogen molecules would result in no left over reactants? Explain your answer.

3. If 165.0g of nitrogen is reacted with 210.0g of hydrogen, what is the theoretical yield of the reaction? What is the excess reactant? What is the limiting reactant? Show your work.