HW 2 & 3 B - Cheung Anthony Stoich 2 Due midnight...

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Cheung, Anthony – Stoich 2 – Due: Oct 29 2006, midnight – Inst: McCord 1 This print-out should have 17 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points Balance the equation ? H 2 CO + ? H 2 O ? CH 4 + ? O 3 . The coefficients are 1. 3; 2; 1; 2. 2. 3; 3; 3; 2. 3. 2; 1; 2; 1. 4. 3; 3; 2; 2. 5. 1; 2; 2; 3. 002 (part 1 of 1) 10 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. 5 . 62 × 10 24 molecules 2. 1 . 26 × 10 25 molecules 3. 1 . 59 × 10 24 molecules 4. 3 . 19 × 10 24 molecules 5. 1 . 69 × 10 25 molecules 003 (part 1 of 1) 10 points Consider the reaction 4 Fe(s) + 3 O 2 (g) 2 Fe 2 O 3 (s). If 12.5 g of iron(III) oxide (rust) are pro- duced from 8.74 g of iron, how much oxygen gas is needed for this reaction? 1. None of these 2. 8.74 g 3. 21.2 g 4. 7.5 g 5. 12.5 g 004 (part 1 of 1) 10 points How much O 2 is required for the complete reaction of 36 g of C 3 H 6 to form CO 2 and H 2 O?
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