Balancing Chemical Equations Exam Questions
and Correct Answers
1. Coefficients correct answer: Tells you about the quantity, or number of molecules in a compound
(Number before Element)
2. Sub-scripts correct answer: Tells you how many atoms of a particular element are in a compound
(Number after Element)
3. Reactants correct answer: Left-side of chemical equation (substances elements are compounds
that are changed)
4. Products correct answer: Right-side of chemical equation (substances elements or compounds
after a chemical reaction
occurs)
5. Molecule correct answer: Are made up of atoms that are bonded or combined together
6. Parts of a Chemical Equation correct answer: Reactants’Products (reactants yields or
produces products)
7. Law of Conservation of Matter (Mass) correct answer: Matter (Mass) can not be be
created or destroyed only
transformed
8. Chemical equations must be balanced because correct answer: correct answer:
Matter cannot be created or destroyed only transformed.
9. Atoms are not or during a chemical reaction.
correct answer: Atoms are not CREATED or DESTROYED during a chemical reaction.
10. Scientists know that there
must be the number of atoms on each
of
the . correct answer: Scientists know that there must be the SAME number of atoms on
each SIDE of the EQUATION.
11. To balance
the chemical equation, you must add in front
of the chemical formulas in the equation. You cannot or
subscripts! correct answer: To balance the chemical equation, you must add
COEFFICIENTS in front of the chemical formulas in the equation. You
cannot ADD or CHANGE subscripts!
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and Correct Answers
1. Coefficients correct answer: Tells you about the quantity, or number of molecules in a compound
(Number before Element)
2. Sub-scripts correct answer: Tells you how many atoms of a particular element are in a compound
(Number after Element)
3. Reactants correct answer: Left-side of chemical equation (substances elements are compounds
that are changed)
4. Products correct answer: Right-side of chemical equation (substances elements or compounds
after a chemical reaction
occurs)
5. Molecule correct answer: Are made up of atoms that are bonded or combined together
6. Parts of a Chemical Equation correct answer: Reactants’Products (reactants yields or
produces products)
7. Law of Conservation of Matter (Mass) correct answer: Matter (Mass) can not be be
created or destroyed only
transformed
8. Chemical equations must be balanced because correct answer: correct answer:
Matter cannot be created or destroyed only transformed.
9. Atoms are not or during a chemical reaction.
correct answer: Atoms are not CREATED or DESTROYED during a chemical reaction.
10. Scientists know that there
must be the number of atoms on each
of
the . correct answer: Scientists know that there must be the SAME number of atoms on
each SIDE of the EQUATION.
11. To balance
the chemical equation, you must add in front
of the chemical formulas in the equation. You cannot or
subscripts! correct answer: To balance the chemical equation, you must add
COEFFICIENTS in front of the chemical formulas in the equation. You
cannot ADD or CHANGE subscripts!
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