OOO AT&T; LTE 8:50 PM T 13%, toro csudh.edu 0.5 points Save Answer Question 13 A
ID: 932161 • Letter: O
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OOO AT&T; LTE 8:50 PM T 13%, toro csudh.edu 0.5 points Save Answer Question 13 A copper ore consisting of 12.5% copper (ll) sulfide, when heated and reacted with oxygen gas, produces copper (ll) oxide and sulfur dioxide. If the reaction has a 90.0% yield, how many grams of copper (ll) oxide are produced when 1.00 kg of the copper ore is processed? a. 150 g b. 749 g O c. 104 g d. 93.7 g 6 g 0.5 points Save Answer Question 14 In a demonstration of strong electrolytes, weak electrolytes, and non electrolytes, Professor Popsnorkle used a lightbulb apparatus that showed how much a solution conducted electricity by the brightness of the lightbulb. When pure water was tested, the bulb did not light. Then Professor Popsnorkle tested the following aqueous solutions. Which one caused the bulb to burn the brightest? O a. ethanol, CH3CH2OH b. table sugar, C12H22011 O c. methanol, CH30H d. acetic acid, CH3COOH e. table salt, NaCl 0.5 points Save Answer Question 15 What is the molar concentration of sodium ions in a 0.3 M sodium phosphate (Na3PO4, 164 g/mol) solution? Sodium phosphate is used as a cleaning agent, food additive, and stain remover. a. 0.3 M b. 0.6 M O C. 1.0 M d. 0.1 M e. 0.9 M 0.5 points Save Answer Question 16 A 125 mL sample of orange juice was titrated using a redox reaction to the equivalence point with the addition of 7.6 mL of a 0.0025M iodine (l2) solution. What is the concentration of vitamin C (C6H8O6) in this sample? C6H8o6 (aq) 12 (aq)® C6H606 (aq) 2-(aq) 2H+(aq) a. 19 mM b. 0.30 mMExplanation / Answer
13 D
14 E
15 E
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