6. On the basis of the reactions observed in the six test tubes, explain why the position of hydrogen cannot be fixed exactly with respect to all of the other elements listed in the activity series in Question 5. 7. What additional test(s) would be needed to establish the exact position of hydrogen in the activity series of the elements listed in Question 5? 8. On the basis of the evidence developed in this experiment: (a) Would silver react with dilute sulfuric acid? Why or why not? (b) Would magnesium react with dilute sulfuric acid? Why or why not?

Pre-Lab Study Questions 1. What property of oil makes it float on water? 2. Why would heating the gas in an air balloon make the balloon rise? 3. What is the difference between density and specific gavity? 4. How does a graph help us interpret scientific data? A. Density of a Solld (Use the "density of a solld demonstration" to collect data.) A.1 Mass of the solid A 2 Volume of the solid by displacement Initial w ater level (mL) Final water level with solid (mL) Volume of solid (mL) A 3 Calculating the density of the solid Show calculations Questions and Problems (Show complete setup) Q.1 An object made of aluminum has a mass of 8.37 g. When it was placed in a graduated cylinder containing 20.0 mL of water, the water level rose to 23.1 ml. Calculate the density and specific gravity of the object B. Density of a Liquid (Use the "Sugar-Water Experiment" to collect data) B.1 Volume of Liquid Type of liquid sugar water B.2 Mass of Liquid Mass of beaker Mass of beaker + liquid Mass of liquid B.3 Density of a Liquid Density Calculations for density) C. Specific Gravity C.l Specific gravity (Show calculations, calculated from B.3) Questions and Problems (Show complete setups) 02 What is the mass of a solution that has a density of 0.,775 g/mL and a volume of 50.0 ml? 03 What is the volume of a solution that has a specifie gravity of 1.2 and a mas of 185

<p>Question 6 /12</p> <p><strong>A company receives $10,000 in cash for services yet to be performed.</strong></p> <p><strong>Using the accrual method, what's the correct entry to record the transaction?</strong></p> <p>(A) Debit cash $10,000, credit accounts receivable $10,000</p> <p>(B) Debit cash $10,000, credit sales revenue$1 0,000</p> <p>(C) Debit sales revenue $10,000, credit cash $10,000</p> <p>(D) Debit cash $10,000, credit unearned revenue $10,000</p> <p>(E) Debit cash $10,000, credit accounts payable $10,000</p> <p>&nbsp;</p> <p>Question 7 /12</p> <p><strong>Per company policy, tools with a purchase price greater than $1,000 are capitalized. What's the correct entry to record a tool purchase of $500?</strong></p> <p>(A) Debit tools expense $500, credit cash $500</p> <p>(B) Debit fixed asset $500, credit tools expense $500</p> <p>(C) Debit fixed asset $500, credit cash $500</p> <p>(D) Debit fixed asset $1,000, cred it cash $1,000</p> <p>(E) Debit tools expense $1,000, cred it cash $1,000</p> <p>&nbsp;</p> <p>Question 9 /12</p> <p><strong>A company performs $10,000 of services and issues an invoice to the customer. Using the accrual method. what's the cored entry to record the transactions?</strong></p> <p>(A) Debit unearned revenue $10,000, credit salles revenue $10,000</p> <p>(B) Debit accounts payable $10,000, credit sales revenue $10,000</p> <p>(C) Debit services expense $10,000, credit sales revenue $10,000</p> <p>(D) Debit cash $10,000, credit sales revenue $10,000</p> <p>(E) Debit accounts receivable $10,000, credit salles revenue $10,000</p>

17. SSE can never be a. larger than SST c. equal to 1 b. smaller than SST d. equal to zero 18. A regression analysis between sales (in S1000) and price (in dollars) resulted in the following equation Y 50,000 -X The above equation implies that an a. increase of $1 in price is associated with a decrease of $8 in sales b. increase of $8 in price is associated with an increase of $8,000 in sales c. increase of $1 in price is associated with a decrease of $42,000 in sales d. increase of $1 in price is associated with a decrease of $8000 in sales Exhibit 12-6 Dependent Variable 20 25 32 43 Independent Variable 12 19. Refer to Exhibit 12-6. The slope of the regression equation is a. 120.348 b. 12.1965 c.-2.5435 d. 2.5435 Refer to Exhibit 12-6. The y intercept is a. 120.348 b. 12.1965 c. -2.5435 20. d. 2.5435

1. Three students have different demands for doughnuts. André's demand is given by Q = 5 - P; Carlene's demand is given by Q = 6 - 2P; Cooper's demand is given by Q = 4 -0.5P. a. Derive the market demand curve for doughnuts algebraically. b. Graph the market demand curve for doughnuts. Pay special attention to any kinks in the market demand!