
Chemistry Quiz
Quiz
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Science
•
10th Grade
•
Practice Problem
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Medium
EternalXVI EternalXVI
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45 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following formulas would have the molecular geometry of the structure shown below?
XeF4
SF4
SiF4
CF4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the molar mass of iron (3) hydroxide?
106.88 g/mol
72.86 g/mol
74.88 g/mol
184.56 g/mol
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following conditions would NOT cause an increase in the concentration of the product of the equilibrium system: 2 CO (g) + O2 (g) → 2 CO2 (g) + 167 KJ
addition of CO
decrease in volume
lower temperature
decrease in pressure
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An equilibrium mixture of SO2, O2, and SO gases at 1500 K is determined to consist of 0.344 mol/L SO2, 0.172 mol/L O2, and 0.56 mol/L SO3. What is the equilibrium constant for the system at this temperature? The balanced equation for this reaction is 2SO2(g) + O2(g) ↔ 2SO3 (g).
0.41
0.065
6.7
15
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following changes to the system at equilibrium would result in an increase in the concentration of O2?
An increase in the concentration of SO2 and an increase in the temperature.
An increase in the concentration of SO2 and a decrease in the temperature.
An increase in the concentration of SO3 and a decrease in the temperature.
An increase in the concentration of SO3 and an increase in the temperature.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the percentage yield if 56.9 g of WO2 yields 41.4 g of tungsten?
83.4%
91.8%
57.7%
79.1%
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If 155g of WO reacts with 25.0g of H2, how many grams of the excess reactant will remain after the reaction is completed?
4.13g
23.0g
21.0g
130.0g
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