SCI 131 WEEK QUIZ QUESTIONS AND ANSWERS

Tests & Quizzes SCI 131 WEEK QUIZ QUESTIONS AND ANSWERS Lesson 05 - Week 05 Quiz Return to Assessment List Part 1 of 1 - 100.0 Points Question 1 of 25 `Sodium and chlorine are very dangerous by themselves. However, when we combine them together in a chemical 4.0 Points reaction, we eat it--it's table salt: 2Na + Cl2 → 2NaCl. If I want to make 50.0 g of my own salt (because I can and that's how I roll), how much elemental sodium would I need? NOTE: All numbers located immediately after elemental symbols should be considered subscripts. A. 50.0 g B. 100.0 g C. 22.99 D. 19.67 g E. not enough information Feedback: Good. See section 8.6 Question 2 of 25 `If you ever watch a shuttle launch, you will see what looks like a crazy amount of smoke at the take off. But if you get up4.0 Points closer to the launch pad afterwards, you will see a bunch of ice! The reason is because hydrogen gas is the fuel, and it is being combusted with oxygen gas to form water: 2H2 + O2 → 2H2O. We will learn later why ice forms here even though it is so warm. But for now, what would be the total mass in grams of water (ice) if you completely combusted 200.0 kilograms of hydrogen gas? NOTE: All numbers located immediately after elemental symbols should be considered subscripts. A. 1784 kg B. 1802 kg C. 3604 kg D. 200.0 kg E. not enough information