1307EX2Atest

1307EX2Atest - Equations: o K = o C + 273.15 o F = 1.8 ( o...

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Unformatted text preview: Equations: o K = o C + 273.15 o F = 1.8 ( o C) + 32 q = m c T = m c (T f T i ) Constants: Specific heat capacity of water: 1.00 cal/g K = 4.184 J/ g K Density of water: 1.00 g/mL Universal gas constant: 0.08206 atm L/mol K = 8.314 J/mol K Conversions: 1 atm = 760 torr (exact) = 760 mm Hg (exact) = 101.325 kPa MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1. According to the following equation, if you have 3.5 moles of potassium permanganate, it will react with ____ moles of potassium nitrite: 2 KMnO 4 + 3 KNO 2 2 MnO 2 + 3 KNO 3 + K 2 O A. 2.3 B. 7.0 C. 5.3 D. 3.5 E. 3.0 2. The percent composition of oxygen in XeO 3 is: A. 8.92% B. 26.8% C. 12.2% D. 36.6% E. 73.2% 3. A particular carbohydrate has the empirical formula CH 2 O and a molar mass of 175 - 185 g/mol. What is the molecular formula of this compound? A. C 6 H 12 O 6 B. C 12 H 24 O 12 C. C 6 H 6 O 6 D. C 2 H 4 O 2 E. C 12 H 6 O 12 4. N 2 H 4 + O 2 N 2 + 2H 2 O The rocket fuel hydrazine, N 2 H 4 , burns cleanly to give products that are not harmful to the environment or the upper atmosphere, water and molecular nitrogen. What mass of water is generated when 64.0 g of N 2 H 4 reacts with 80.0 g of O 2 ? A. 4.0 g B. 18.0 g C. 36.0 g D. 90.0 g E. 72.0 g 5. The percentage composition of an organic compound is 84.09 % C and 15.91 % H. What is the empirical formula of this compound? A. CH 2 B. C 7 H 16 C. C 7 H 15 D. C 4 H 9 E. C 4 H 7 6. When 0.1665 mol of acetic acid (CH 3 COOH ) was mixed with excess NaOH, 12.98 g of sodium acetate (CH 3 COONa, 82.03 g/mol) was recovered from the product mixture. What is the % yield of sodium acetate?...
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1307EX2Atest - Equations: o K = o C + 273.15 o F = 1.8 ( o...

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