
Stoichiometry
Quiz
•
Chemistry
•
10th Grade
•
Medium
Enos Inniss
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In the reaction 2RbNO3 --> 2RbNO2 + O2, how many moles of O2 are produced when 7.0 moles of RbNO3 decompose?
1.0 mol
3.5 mol
4.0 mol
7.0 mol
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
(2-part question) For the equation Ca(OH)2 + HCl --> CaCl2 + H2O what are the correct ratios? How many moles of water form from 4 moles of HCl?
1,2,1,2 and 4 mol
1,2,1,2 and 2 mol
1,1,1,1 and 4 mol
1,1,1,1 and 2 mol
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In the reaction N2 + 3H2 --> 2NH3, what is the mole ratio of hydrogen to nitrogen?
1 : 1
1 : 2
3 : 1
3 : 2
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
From the reaction CH4 + 4Cl2 --> CCl4 + 4HCl, how many grams of CCl4 are produced by reacting 650.0 g Cl2 with excess methane?
3.529 g
70.57 g
352.9 g
7057 g
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
An experiment involving Ca(CO3) + 2HCl --> H2O + CO2 + CaCl2 yields 90 g of CO2. What is the percent yield if 150 g of HCl was used?
87.6%
96.3%
98.2%
100%
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
A student burns 1.50 mol C3H8 following the reaction
C3H8 + 5O2 --> 3CO2 + 4H2O
How many grams of CO2 are produced?
44.0 g
66.1 g
132 g
198 g
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
For the balanced equation
3CaCl2 + 2Na3(PO4) --> Ca3(PO4)2 + 6NaCl
when you added 163.9 g of Na3(PO4) you produced 116 g Ca3(PO4)2. What was the percent yield?
141%
74.8%
70.8%
50.0%
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