Naming and balancing chemical equations Exam
Questions and Correct Answers
1. Insoluble solid produced in a chemical reaction correct answer:
Precipitate
2. When do chemical reactions occur ? correct answer: They occur when chemical bonds
between atoms are broken and new bonds are formed
3. Used to describe chemical reactions through symbols and numbers
correct answer: Chemical equation
4. What is the law of conservation of mass ? correct answer: -matter is not created
or destroyed in reactions, it just changes form
-it is against the law to not balance chemical equations
5. What does ---> mean ? correct answer: It means yields, reacts, produces, forms
6. What does <--- ---> mean? correct answer: Reversible reaction
7. What is a catalyst? correct answer: Something that speeds up a reaction; but is not used in
the reaction
8. Where is the catalyst written? correct answer: On top of the yield sign
9. What does (qq) mean ? correct answer: Aqeuou, dissolved in water
10. What does NR mean ? correct answer: No reaction
11. What does a downwards arrow mean ? correct answer: Solid product
(precipitate)
12. What does an upwards arrow mean ? correct answer: Gaseous
product
13. What is synthesis ? correct answer: 2 or more
substances --> single compound A B --> AB
14. What is another name for synthesis ? correct answer: Combination
15. What is decomposition ? correct answer: Single
compound --> 2 or more substances AB --> A B
16. In what reaction is energy in the form of light, heat, or
electricity often supplied ? correct answer: Decomposition
17. What is single replacement ? correct answer: Element +
1/
3
Questions and Correct Answers
1. Insoluble solid produced in a chemical reaction correct answer:
Precipitate
2. When do chemical reactions occur ? correct answer: They occur when chemical bonds
between atoms are broken and new bonds are formed
3. Used to describe chemical reactions through symbols and numbers
correct answer: Chemical equation
4. What is the law of conservation of mass ? correct answer: -matter is not created
or destroyed in reactions, it just changes form
-it is against the law to not balance chemical equations
5. What does ---> mean ? correct answer: It means yields, reacts, produces, forms
6. What does <--- ---> mean? correct answer: Reversible reaction
7. What is a catalyst? correct answer: Something that speeds up a reaction; but is not used in
the reaction
8. Where is the catalyst written? correct answer: On top of the yield sign
9. What does (qq) mean ? correct answer: Aqeuou, dissolved in water
10. What does NR mean ? correct answer: No reaction
11. What does a downwards arrow mean ? correct answer: Solid product
(precipitate)
12. What does an upwards arrow mean ? correct answer: Gaseous
product
13. What is synthesis ? correct answer: 2 or more
substances --> single compound A B --> AB
14. What is another name for synthesis ? correct answer: Combination
15. What is decomposition ? correct answer: Single
compound --> 2 or more substances AB --> A B
16. In what reaction is energy in the form of light, heat, or
electricity often supplied ? correct answer: Decomposition
17. What is single replacement ? correct answer: Element +
1/
3
