Practice test 2 - Practice Exam 2 Multiple Choice Identify...

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Practice Exam 2 Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. Calcium reacts with fluorine gas to produce calcium fluoride. How many moles of Ca will react with 1.0 moles of F 2 ? a. 0.50 mol b. 1.0 mol c. 1.5 mol d. 2.0 mol e. 4.0 mol ____ 2. The reaction of water and coal at a high temperature produces a mixture of hydrogen and carbon monoxide gases. This mixture is known as synthesis gas (or syngas). What mass of hydrogen gas can be formed from the reaction of 51.3 g of carbon with excess water? C(s) + H 2 O(g) H 2 (g) + CO(g) a. 4.31 g b. 8.61 g c. 17.2 g d. 1.20 × 10 2 g e. 306 g ____ 3. Sodium carbonate reacts with hydrochloric acid as shown below in an unbalanced chemical equation. What mass of CO 2 is produced from the reaction of 2.94 g Na 2 CO 3 with excess HCl? Na 2 CO 3 (s) + HCl(aq) NaCl(aq) + CO 2 (g) + H 2 O( λ ) a. 1.22 g b. 2.44 g c. 2.94 g d. 5.88 g e. 7.08 g ____ 4. The compound P 4 S 3 is used in matches. It reacts with oxygen to produce P 4 O 10 and SO 2 . The unbalanced chemical equation is shown below. P 4 S 3 (s) + O 2 (g) P 4 O 10 (s) + SO 2 (g) What mass of O 2 will react with 0.641 grams of P 4 S 3 ? a. 0.0466 g b. 0.0932 g c. 0.186 g d. 0.372 g e. 0.746 g ____ 5. What is a correct method for determining how many grams of oxygen react with 1.00 gram of pentane? C 5 H 12 (g) + 8 O 2 (g) 5 CO 2 (g) + 6 H 2 O(g)
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a. 1.00 g C 5 H 12 = b. 1.00 g C 5 H 12 = c. 1.00 g C 5 H 12 = d. 1.00 g C 5 H 12 = e. 1.00 g C 5 H 12 = ____ 6. How many moles of potassium bromide can be produced from the reaction of 2.92 moles of potassium with 1.78 moles of bromine gas? 2 K(s) + Br
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This note was uploaded on 04/19/2008 for the course CHM 2045 taught by Professor Geiger during the Fall '08 term at University of Central Florida.

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Practice test 2 - Practice Exam 2 Multiple Choice Identify...

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