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Transcript
Announcements 1. 2. 3. 4. 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) B) C) D) E) moles grams molarity atm Any unit can be directly related to a balanced chemical equation. Mass Volume (Solution) Limiting reactant Molarity Gas Properties (P, V, T) MOLES! (# of particles) Calculate amount of product Balance equations Clicker #2 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) B) C) D) 3 moles of N2 and 3 moles of H2 2 mol NH3 1 mole of N2 and 6 moles of H2 2 mol NH3 1 mole of N2 and 3 moles of H2 2 mol NH3 Each would produce the same amount of product. 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) B) C) D) E) 1.24 5.00 9.54 10.0 15.0 g g g g g
