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Jouer Froggy Jumps
1. What is the purpose of balancing chemical equations?
A
To increase the reaction rate
B
To make the equation look neat
C
To satisfy the law of conservation of mass
2. What does a coefficient in a chemical equation represent?
A
The temperature of the reaction
B
The state of matter of the substance
C
The number of molecules or atoms of each substance
3. In a balanced chemical equation, the number of atoms of each element is the same on both sides. True or False?
A
Depends on the reaction
B
True
C
False
4. What is the first step in balancing a chemical equation?
A
Determine the products of the reaction
B
Add coefficients to balance the atoms
C
Write down the unbalanced equation
5. What does the law of conservation of mass state?
A
Matter cannot be created or destroyed in a chemical reaction
B
Matter can be destroyed in a chemical reaction
C
Matter can be created in a chemical reaction
6. What is the product of the reaction between hydrogen and oxygen?
A
Water
B
Carbon dioxide
C
Hydrogen peroxide
7. What is the coefficient of O2 in the balanced equation for the combustion of methane (CH4 + O2 -> CO2 + H2O)?
A
3
B
1
C
2
8. What is the coefficient of CO2 in the balanced equation for the combustion of propane (C3H8 + O2 -> CO2 + H2O)?
A
3
B
4
C
2
9. What is the coefficient of H2O in the balanced equation for the reaction between sulfuric acid and sodium hydroxide?
A
2
B
3
C
1
10. What is the sum of the coefficients in the balanced equation for the reaction between iron and oxygen?
A
3
B
5
C
4