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Question 1 (1 point) Consider the reaction Sn(s) + 2 HBr(aq) → H₂(g) + SnBr2 (aq) How many grams of Sn(s) are needed to completely react with 6.10 grams of HBr(aq)? Ag Sn(s) Question 2 (1 point) The combustion of butane C4H10 in oxygen gas (O₂), produces carbon dioxide and water. When one sample of butane burned, 1.00 g of water formed. How many grams of O2 reacted? A 8 P2reacted. Question 3 (1 point) Silver nitrate, AgNO3 reacts with iron (III) chloride to give silver chloride, AgCl and iron (III) nitrate. A solution containing 18.0 g of silver nitrate was mixed with a solution containing 32.4 g of iron (III) chloride. How many grams of AgCl are produced by the reaction? A g AgCl are produced.

8 ** 21 24 Question 4 (1 point) Consider the reaction Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g) If 8.12 moles of Zn(s) and 7.48 moles of HCI (aq) are allowed to react, how many moles of ZnCl₂ (aq) will be produced? Amol ZnCl₂ (aq) are produced. Question 5 (1 point) Consider the reaction C3H8(g) + 5O2(g) → 3 CO2(g) + 4H₂O(1) If 4.70 g of C3H8 (g) is added to 4.42 of O2 (g), how many grams of CO2(g) can be produced? AgCO2 (g)are produced. Question 6 (1 point) Consider the reaction 2C8H18 (1) +2502(g) → 16 CO2(g) + 18H₂O (1) If 7.62 grams of Cg H18 (1) are added to 7.38 grams of O₂(g). How many grams of which reactants will be left over, when the reaction is complete?

6 9 1 12 15 18 21 Question 6 (1 point) Consider the reaction 2C8H18 (1) +2502(g) → 16 CO2(g) + 18H₂O(1) If 7.62 grams of C8H18 (1) are added to 7.38 grams of O₂(g). How many grams of which reactants will be left over, when the reaction is complete? AV B A/ will be left over. Question 7 (1 point) Phosphorus tribromide and water react to form phosphorous acid and HBr. If 0.5000 mole of phosphorus tribromide reacts with 2.000 mol of water and 98.048 g HBr is obtained, what is the percent yield of HBr? A % yield of HBr.

6 9 12 15 18 21 1 24 Question 8 (1 point) Balance the following equation with the smallest integer coefficients (no fractions). (Coefficients of "1" are usually not written in balanced equations, but write them here.) ALi+ AF2 →>> A LIF Question 9 (1 point) Balance the following equation with the smallest integer coefficients (no fractions). (Coefficients of "1" are usually not written in balanced equations, but write them here.) A C₂H6 (g) + A 215/ A CO₂ (g) H₂O (g)

2 5 18 21 24 Question 10 (1 point) Balance the following equation with the smallest integer coefficients (no fractions). (Coefficients of "1" are usually not written in balanced equations, but write them here.) Ay CaO (s)+ A C(s) → 4 CaC₂ (s) A CO (g) Question 11 (1 point) When the following equation is balanced, there are moles of O2 (g) for every 2 moles of C4H10 (1). C4H10 (1) + O2(g) → CO2(g) + Question 12 (1 point) 3 mL of a 1 M solution of HCI contains moles of HCI

3 6 9 12 15 18 21 24 Question 12 (1 point) 3 mL of a 1 M solution of HCI contains AV moles of HCI Question 13 (1 point) If 15.00 mL of 0.235 M KOH is diluted to a volume of 25.0 mL, what is the molarity of the resulting solution? A M Question 14 (1 point) many Mow milliliters of a stock 0.400 M NH4 Br solution are required to prepare 200.0 mL of 4.00x10-3 M NH4 Br solution? A mL of stock solution Question 15 (1 point) A solution of KOH is prepared by diluting 7.50 mL of a stock KOH solution to a volume of 150.0 mL. Analysis of the diluted solution indicates that it is a 1.00x10 2M KOH solution. What was the molarity of KOH in the stock solution, before it was diluted? AM KOH

6 9 12 A 15 18 Question 16 (1 point) Write an equation for the dissociation of (NH4)2CO3 in water.

2 5 8 - 21 24 Question 17 (1 point) Give the formula and molarity of the most abundant ions in a 0.285 M SrCl₂ solution. Type subscripts and superscripts in the formulas as ordinary numbers, and type charges sign-first (-2, not 2-). For example, AsO4-3 would be typed as AsO4-3. Cation Concentration: A/ M. Cation formula: A Anion concentration: A M. Anion formula: Question 18 (1 point) Give the formula and molarity of the most abundant ions in a 0.325 Me solution. Type subscripts and superscripts in the formulas as ordinary numbers, and type charges sign-first (-2, not 2-). For example, AsO43 would be typed as AsO4-3. Cation Concentration: A M. Cation formula: A/ Anion concentration: A M. Anion formula:

Question 19 (1 point) Hydrobromic acid, HBr, is a strong acid with one ionizable hydrogen. Write equations for its ionization in water. Using hydrogen ions, the equation is Using hydronium ions, the equation is

Question 20 (1 point) Formate ion, CHO2, can accept a hydrogen ion to form HCHO2. Write an equation that shows why solutions of formate ion in water are basic. Question 21 (2 points) Write balanced molecular, ionic, and net ionic equations for the reaction of HBrO2 with NaOH. Both reactants are dissolved in water. The products are water and a soluble ionic compound.

5 18 21 24 Question 22 (1 point) Complete the following molecular equation. If there is no reaction, type 'no reaction Type subscripts as ordinary numbers (for example, Fe2O3 would be typed as Fe203). Specify the states of solid, liquid, or gaseous products. Pb(NO3)2(aq) + 2Kl(aq) → N Question 23 (1 point) Explain what a REDOX reaction is. How can you identify each type of reactant?

Question 24 (1 point) What is the difference between a combination, combustion, and a double displacement reaction?