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Graded Assignment SCI303A/304A: Chemistry | Unit 6 | Lesson 6: Mid-Unit Test Graded Assignment Mid-Unit Test, Part 2 Answer the following questions. You may use the periodic table in the Chemistry: Problems and Solutions book for this test. When you have finished, submit this assignment to your teacher by the due date for full credit. (5 points) Score 1. For an experiment, a biology student makes 1 liter of a solution containing the following substances, which are shown in the table below. Using the given information, fill in the missing parts of the table for each substance by (a) providing the formula weight and (b) calculating either the mass the student needs to weigh out or the number of moles that the student has, based on the amount weighed out. For each calculation, show your work. Be sure to include the formula mass of water for CaCl2 2H2O and NaH2PO4 H2O. Substance Formula Weight (g/mol) Number of Moles NaCl 58.4 0.14 KCl 74 0.005 C6H12O6 180.2 NaHCO3 84 1.01 0.0262 CaCl2 2H2O 0.15 MgSO4 NaH2PO4 H2O Mass (g) 0.0008 120.4 0.14 Answer: (5 points) Score © 2008 K12 Inc. All rights reserved. Copying or distributing without K12’s written consent is prohibited. Page 1 of 2 Graded Assignment 2. SCI303A/304A: Chemistry | Unit 6 | Lesson 6: Mid-Unit Test Acetaminophen (C8H9NO2) is the active ingredient in many nonprescription pain relievers. Each tablet contains 500 mg of acetaminophen, and a typical adult dose is two tablets every eight hours. Determine the molar mass of acetaminophen (show your work). Calculate the number of moles of acetaminophen in a single tablet (show your work). Calculate the number of moles of acetaminophen that an adult would have taken if she took three doses of acetaminophen in one day (show your work). Answer: (8 times 12) + (1 times 9)+ (1 times 14) + (2 times 16) = 151 for molar mass of acetaminophen Molacetaminophen = 500mg divided by mass of acetaminophen = 3.311 Molacetaminophen + (500mg times 3 doses) divided by molar mass acetaminophen = 9.933 Your Score ___ of 10 © 2008 K12 Inc. All rights reserved. Copying or distributing without K12’s written consent is prohibited. Page 2 of 2