1. Clicker #1
When comparing what you’re given to a balanced chemical equation, you must be in units of
A) moles
B) grams
C) molarity
D) Any unit can be directly related to a balanced chemical equation.

2. Clicker #2 N2(g) + 3H2(g) → 2NH3(g) A) 3 moles of N2 and 3 moles of H2
Which of the following reaction mixtures would produce the greatest amount of product, assuming all went to completion? Each involves the reaction symbolized by the equation:
N2(g) + 3H2(g) → 2NH3(g)
A) 3 moles of N2 and 3 moles of H2
B) 1 mole of N2 and 6 moles of H2
C) 1 mole of N2 and 3 moles of H2
D) Each would produce the same amount of product.
2 mol NH3

3. Example #1
If 15.0 mg of P2O5 was produced in this reaction, what masses of P4 and KClO3 were required?

4. Example #2
Assume you have 5.00 g of Mg and 10.0 g of CO2 available. You allow them to react. Prove that mass has been conserved.