Download Unit 4 Activity 3 Quiz - Stoichiometry Concepts SC 2019 FALL-CHM151AA 20919

Unit 4 Activity 3 Quiz - Stoichiometry Concepts
Due Nov 13, 2019 at 11:59am
Points 5
Questions 5
Available after Oct 30, 2019 at 1:15pm
Time Limit 15 Minutes
Allowed Attempts 2
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Attempt History
LATEST
Attempt
Time
Score
Attempt 1
8 minutes
5 out of 5
Correct answers are hidden.
Score for this attempt: 5 out of 5
Submitted Nov 12, 2019 at 8:59pm
This attempt took 8 minutes.
1 / 1 pts
Question 1
The flask diagrammed above contains hydrogen and oxygen gas. When a
spark is touched to the flask they combine to form water according to the
equation:
2 H2(g) + O2(g) --> 2 H2O(g)
If the original reaction mixture contained more oxygen gas, the amount of
water produced would:
increase
the answer depends on the amount of oxygen added
stay the same
decrease
Question 2
1 / 1 pts
Consider the following reaction:
CH4(g) + 4 Cl2(g) --> CCl4(g) + 4 HCl(g)
What mass of CCl4 is formed by the reaction of 8.00 g of methane with an
excess of chlorine gas?
76.7 g
7.10 g
1.42 g
14.2 g
Question 3
1 / 1 pts
Given the equation:
3 A + B --> C + D
You react 2 moles of A with 1 mole of B. Which of the following
statements is true?
B is the limiting reactant because you have fewer moles of B than A
A is the limiting reactant because you need 3 moles of A to react and have
2
Neither reactant is limiting
A is the limiting reactant if it has a higher molar mass
B is the limiting reactant because 3 A molecules react with 1 B molecule.
1 / 1 pts
Question 4
The limiting reactant in a reaction is the reactant:
that has the lowest molar mass
that has the lowest mass in grams
that is used up when the reaction has gone to completion
that is left over when the reaction has gone to completion
that has the lowest coefficient in the balanced equation
1 / 1 pts
Question 5
Nitrogen gas and hydrogen gas react to form ammonia gas by the
reaction
N2 + 3 H2 --> 2 NH3
The box shown here represents a mixture of nitrogen and hydrogen
molecules before the reaction begins:
Which of the boxes below most correctly shows what this reaction mixture
would look like after the reaction was complete?
Quiz Score: 5 out of 5