UTexas # 11

UTexas # 11 - Consider the reaction oF CaCN 2 and water to...

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lh gosiewski (kl22543) – UTexas # 11 – Rinaldi – (555551) 1 This print-out should have 5 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points Consider the Following reaction. N 2 + 3 H 2 2 NH 3 . 28.0 grams oF N 2 and 5.04 grams oF H 2 are reacted, producing 17.8 grams oF NH 3 . What is the percent yield? 1. 84.0% 2. 52.4% 3. 14.7% 4. 191% 5. Not enough inFormation is given. 6. 62.9% 7. 34.0% 002 10.0 points Consider the Following reaction: CaCN 2 + 3 H 2 O CaCO 3 + 2 NH 3 105.0 g CaCN 2 and 78.0 g H 2 O are reacted. Assuming 100% e±ciency, which reactant is in excess and how much is leFtover? The molar mass oF CaCN 2 is 80.11 g/mol. The molar mass oF CaCO 3 is 100.09 g/mol. 1. H 2 O; 10.7 g leFt over 2. H 2 O; 7.20 g leFt over 3. CaCN 2 ; 70.8 g leFt over 4. CaCN 2 ; 10.7 g leFt over 5. CaCN 2 ; 7.20 g leFt over 6. H 2 O; 70.8 g leFt over 003 10.0 points
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Unformatted text preview: Consider the reaction oF CaCN 2 and water to produce CaCO 3 and NH 3 according to the reaction CaCN 2 + 3 H 2 O CaCO 3 + 2 NH 3 . How much CaCO 3 is produced upon reac-tion oF 45 g CaCN 2 and 45 g oF H 2 O? 1. 750 g 2. 28 g 3. 250 g 4. 56 g 5. 19 g 6. 83 g 7. 38 g 004 10.0 points Consider the reaction N 2 + 3 H 2 2 NH 3 . How much NH 3 can be produced From the reaction oF 74.2 g oF N 2 and 14.0 moles oF H 2 ? 1. 1 . 69 10 25 molecules 2. 3 . 19 10 24 molecules 3. 1 . 26 10 25 molecules 4. 1 . 59 10 24 molecules 5. 5 . 62 10 24 molecules 005 10.0 points In the reaction below, 24 g oF H 2 S with excess O 2 produced 4 g oF sulFur. ? H 2 S + ? O 2 ? S + ? H 2 O . What is the percent yield oF sulFur? Answer in units oF %....
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