Announcements Prelaboratory Assignment due at the beginning of lab tomorrow (pg. 42 of lab book). Proper dress required for lab! Online HW 4 (Type II) due tomorrow by 7:00pm. Online HW 5 (Type I) due Monday 10/21 and (Type II) due Wednesday 10/23.

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) atm E) Any unit can be directly related to a balanced chemical equation.

Calculate amount of product Mass Limiting reactant Molar mass Calculate amount of product MOLES! Volume (Solution) Molarity (# of particles) Ideal gas law Balance equations Gas Properties (P, V, T)

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

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

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.

Clicker #3 What should be the total mass present after the reaction is complete? A) 1.24 g B) 5.00 g C) 9.54 g D) 10.0 g E) 15.0 g