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final exam MC review file 8

# final exam MC review file 8 - M1 SECTION M LABORATORY INDEX...

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M–1 SECTION M: LABORATORY INDEX: M001 LEVEL: (U) ANSWER: KEYWORDS: introductory concepts ALTERNATIVE FORMAT: (SA) Omit responses. What is the correctly reported mass of water based on this data? Mass of beaker and water 29.62 g Mass of beaker only 28.3220 g (A) 1.3 g (B) 1.30 g (C) 1.298 g (D) 1.2980 g INDEX: M002 LEVEL: (U) ANSWER: KEYWORDS: introductory concepts ALTERNATIVE FORMAT: (SA) Omit responses. What is the correct reading for the buret? 32 33 (A) 32 mL (C) 32.26 mL (B) 32.2 mL (D) 33.74 mL INDEX: M003 LEVEL: (U) ANSWER: KEYWORDS: introductory concepts ALTERNATIVE FORMAT: (TF) A(n) will deliver a 25.00 mL liquid sample more precisely than a(n) . Use pairs of responses in separate questions. To deliver a 25.00 mL liquid sample most precisely, which piece of glassware would you use? (A) volumetric flask (C) volumetric pipet (B) graduated cylinder (D) eye dropper (SA) = short answer; (FR) = free response; (TF) = true/false (U) = understanding; (A) = analysis; (G) = generalization

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Laboratory M–2 INDEX: M004 LEVEL: (U) ANSWER: KEYWORDS: introductory concepts ALTERNATIVE FORMAT: (SA) Omit responses. A student determined the percent water in a sample. In four trials values of 16.145, 16.160, 16.156, and 17.279 were obtained for the percent water in a sample. What value should be used for the reported percent water? (A) 16.154 (B) 16.435 (C) 16.145 (D) 17.279 INDEX: M005 LEVEL: (U) ANSWER: KEYWORDS: introductory concepts ALTERNATIVE FORMAT: (TF) The melting point of an impure compound is generally . Use pairs of responses in separate questions. The melting point of an impure compound is generally (A) higher than that of the pure solid. (B) the same as that of the pure solid. (C) lower than that of the pure solid. (D) a function of the vapor pressure of the impurity. (SA) = short answer; (FR) = free response; (TF) = true/false (U) = understanding; (A) = analysis; (G) = generalization
Laboratory M–3 INDEX: M006 LEVEL: (A) ANSWER: KEYWORDS: introductory concepts ALTERNATIVE FORMAT: (FR) Devise a procedure that can be used to demonstrate experimentally that the reaction 2Mg + O 2 2MgO obeys the Law of Conservation of Matter. Which procedure can be used to demonstrate experimentally that the reaction 2Mg + O 2 2MgO obeys the Law of Conservation of Matter? (A) Take a mass of 1.0000 g of Mg ribbon, burn it in pure O 2 , and compare the mass of the product with the original mass of the Mg. (B) Show that the sum of 2 atomic molar masses of Mg plus 1 molar mass of O 2 is equal to 2 molar masses of MgO. (C) Determine the mass of a sealed flash- bulb containing magnesium and oxygen, ignite the mixture, cool, and compare the final mass of bulb plus contents with the original mass of the bulb plus contents. (D) Burn 1.0000 g of Mg ribbon in a tall beaker filled with air, scrape out all of the MgO formed, and compare with the original mass of the Mg. INDEX: M007 LEVEL: (A) ANSWER: KEYWORDS: introductory concepts, solutions and colloids ALTERNATIVE FORMAT: (SA) Some sodium chlorate, NaClO 3 , is decomposed by heating and all its oxygen is driven out. What is a suitable solvent for removing the residue in the test tube?

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