Post-Lab Questions 1. Balance and classify the following reactions as a synthesis (SY), decomposition (SR), double replacement (DR) or combustion (CO) reaction: Chemical Equation # 1 C₂H6 + 02 → CO2 + H₂O

[Tutorial: Limiting reactant stoichiometry] This question will walk you through the steps of calculating the mass of products produced based on your determination of the limiting reactant.   b) Step 2a: Use dimensional analysis to determine the theoretical yield of the product. Calculate the theoretical yield in grams Al₂O₃ from the complete reaction of 64.7 grams Al according to the following balanced chemical equation: 2 Al(s) + Fe₂O₃(s) → Al₂O₃(s) + 2 Fe(s) c) Calculate the theoretical yield in grams Al₂O₃ from the complete reaction of 201 grams Fe₂O₃ according to the following balanced chemical equation: 2 Al(s) + Fe₂O₃(s) → Al₂O₃(s) + 2 Fe(s) d) Which of the following substances is the limiting reactant? e) What is the mass in grams of the excess Fe₂O₃ remaining after the partial reaction of 201 g Fe₂O₃ with 64.7 g Al? Give your answer to three significant figures.

Classify each chemical reaction: Reaction Ba (C1O3)₂ (s) → BaCl₂ (s) + 30₂ (g) 2 2Crl₂(aq) + 3Pb (NO3)₂ (aq) → 2Cr(NO3), (aq) + 3PbI₂ (s) 2 2Al(s) + 3ZnBr₂ (aq) 2A1Br, (aq) + 3Zn(s) Type choose one choose one choose one ↑ ŵ ↑

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From the list of reactions below, pick out the combustion reactions?        1) 2C2H6(g) + 7O2 (g) →  4CO2(g) + 6H2Ol)           2) MgO(s) + CO2 (g) → MgCO3(s)           3) ZnCO3(s) →  ZnO (s) + CO2 (g)           4) 2CH3OH(l) + 3O2 (g) →  2CO2(g) + 4H2O(l)     a 1, 2, 3, and 4   b 3 and 4   c 2, 3, and 4   d 1, 3, and 4   e 1 and 4

[Review Topics] [References] "Smelling salts," which are used to revive someone who has fainted, typically contain ammonium carbonate, (NH4)2CO3. Ammonium carbonate decomposes readily to form ammonia, carbon dioxide, and water. The strong odor of the ammonia usually restores consciousness in the person who has fainted. The unbalanced equation is (NH4)2CO3 (8)→ NH3(g) + CO₂(g) + H₂O(g) Calculate the mass of ammonia gas that is produced if 0.850 g of ammonium carbonate decomposes completely. g NH3 Submit Answer Mastered Retry Entire Group 8 more group attempts remaining Previous Next Save and Exit

Suppose a pair of chemical compounds A and B can react in two different ways: A+B C Reaction 1 gives product C. A+B D →> Reaction 2 gives product D. The following facts are known about the two reactions: • Reaction 1 is endothermic and Reaction 2 is exothermic. • If a reaction vessel is charged ("filled") with A and B, then at first C is produced faster than D. Use these facts to sketch a qualitative reaction energy diagram for both reactions. Note: because these sketches are only qualitative, the energies don't have to be exact. They only have to have the right relationship to each other. For if one energy is less than another, that fact should be clear in your sketch. energy A + B Reaction 1 reaction coordinate energy A + B Reaction 2 reaction coordinate ☑

Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients

Choose the reaction that represents the combustion of C6H1202. C6H12O2(1) + 8 O2(g) →6 CO2(g) + 6 H₂O(g) O Mg(s) + C6H1202(1)→ MgC6H₁202(aq) 6 C(s) + 6 H₂(g) + O2(g) → C6H12O2(1) C6H12O2(1)→6 C(s) + 6 H₂(g) + O2(g) None of these represent the combustion of C6H12O2.

Predict the products of the reaction below. That is, complete the right-hand side of the chemical equation. Be sure your equation is balanced and contains state symbols after every reactant and product. HBr (aq) + H2O(l) → ローロ х G