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Quiz
•
others
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12th Grade
•
Practice Problem
•
Hard
Abdissa Gebisa
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29 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is NOT a type of chemical reaction?
Combustion
Synthesis
Displacement
Vaporization
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the balanced equation for the combustion of methane (CH4)?
CH4 + O2 → CO2 + H2O
CH4 + 2O2 → CO2 + 2H2O
CH4 → CO2 + 2H2O
CH4 + 3O2 → CO2 + H2O
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many moles of oxygen gas (O2) are needed to completely react with 5 moles of hydrogen gas (H2) according to the balanced equation? 2H2 + O2 → 2H2O
2 moles
5 moles
10 moles
15 moles
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the stoichiometric coefficient of water (H2O) in the balanced equation for the reaction between sulfuric acid (H2SO4) and potassium hydroxide (KOH)? H2SO4 + 2KOH → K2SO4 + 2H2O
1
2
3
4
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is a double displacement reaction?
2H2 + O2 → 2H2O
NaCl + AgNO3 → AgCl + NaNO3
CH4 + 2O2 → CO2 + 2H2O
Fe + S → FeS
6.
MULTIPLE SELECT QUESTION
1 min • 1 pt
What is the molar mass of calcium phosphate (Ca3 (PO4)2)?
310.18 g/mol
278.18 g/mol
198.08 g/mol
310.18 g/mol
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many moles of carbon dioxide (CO2) are produced when 4 moles of methane (CH4) are combusted?
2 moles
4 moles
8 moles
16 moles
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