6/6/2017 APUS CLE : SCIN131 B007 Spr 17 : Tests & Quizzes
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
4.0 Points
chemical
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
https://edge.apus.edu/portal/site/355051/tool/2b59222e-6df2-4d93-882a-547c4d16935b/jsf/delivery/deliverAssessment# 1/11
, 6/6/2017 APUS CLE : SCIN131 B007 Spr 17 : Tests & Quizzes
Feedback: Good. See section 8.6
Question 3 of 25
`Let's just consider the concept of stoichiometry without any confusing chemicals. Here is a generic equation: 2A + 6B 4.0 Points
→ 3C. If you mix 4 units of A and 11 units of B, what would be the theoretical yield of C?
A. 8
B. 3
C. 6
D. 5.5
E. none of the above
Feedback: Good. See section 8.5
Question 4 of 25
`Sodium and chlorine are very dangerous by themselves. However, when we combine them together in a
4.0 Points
chemical
reaction, we eat it--it's table salt: 2Na + Cl2 → 2NaCl. If I have 5.00 mol of chlorine gas and excess sodium, how many
moles if table salt could I theoretically make? NOTE: All numbers located immediately after elemental symbols should be
considered subscripts.
A. 5.00
B. 10.0
C. 1.0
D. 2.00
E. not enough information
Feedback: Good. See section 8.6
Question 5 of 25
`If carbon dioxide is streamed over silicon in the right conditions, you can produce solid carbon and silicon
4.0 Points
dioxide:
CO2 + Si → SiO2 + C. Suppose if you stream 1.50 mole of CO2 over 1.50 mole of Si. Which of the choices below represent a
true statement about this reaction? NOTE: All numbers located immediately after elemental symbols should be considered
subscripts.
https://edge.apus.edu/portal/site/355051/tool/2b59222e-6df2-4d93-882a-547c4d16935b/jsf/delivery/deliverAssessment# 2/11
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
4.0 Points
chemical
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
https://edge.apus.edu/portal/site/355051/tool/2b59222e-6df2-4d93-882a-547c4d16935b/jsf/delivery/deliverAssessment# 1/11
, 6/6/2017 APUS CLE : SCIN131 B007 Spr 17 : Tests & Quizzes
Feedback: Good. See section 8.6
Question 3 of 25
`Let's just consider the concept of stoichiometry without any confusing chemicals. Here is a generic equation: 2A + 6B 4.0 Points
→ 3C. If you mix 4 units of A and 11 units of B, what would be the theoretical yield of C?
A. 8
B. 3
C. 6
D. 5.5
E. none of the above
Feedback: Good. See section 8.5
Question 4 of 25
`Sodium and chlorine are very dangerous by themselves. However, when we combine them together in a
4.0 Points
chemical
reaction, we eat it--it's table salt: 2Na + Cl2 → 2NaCl. If I have 5.00 mol of chlorine gas and excess sodium, how many
moles if table salt could I theoretically make? NOTE: All numbers located immediately after elemental symbols should be
considered subscripts.
A. 5.00
B. 10.0
C. 1.0
D. 2.00
E. not enough information
Feedback: Good. See section 8.6
Question 5 of 25
`If carbon dioxide is streamed over silicon in the right conditions, you can produce solid carbon and silicon
4.0 Points
dioxide:
CO2 + Si → SiO2 + C. Suppose if you stream 1.50 mole of CO2 over 1.50 mole of Si. Which of the choices below represent a
true statement about this reaction? NOTE: All numbers located immediately after elemental symbols should be considered
subscripts.
https://edge.apus.edu/portal/site/355051/tool/2b59222e-6df2-4d93-882a-547c4d16935b/jsf/delivery/deliverAssessment# 2/11
