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- 1. Multiple Choice
In a chemical equation...
a new substance is formed
new atoms are formed
old atoms disappear
a equal sign is always used
- 2. Multiple Choice
Reactants are
new substances
old substances
likely to disappear
likely to appear
- 3. Multiple Choice
Products are
old substances
new substances
atoms that disappear
atoms that do not exist
- 4. Multiple Choice
When writing a chemical equation, reactants are on the _____________ while products are on the _________________.
top, bottom
right, left
left, right
bottom, top
- 5. Multiple Choice
An arrow in a chemical equation means the reaction is irreversible.
True
False
- 6. Multiple Choice
A worded equation...
are detailed
includes subscripts
includes coefficients
uses the full names of the substances
- 7. Multiple Choice
Worded equations provide the amount of each substance in the reaction
True
False
- 8. Multiple Choice
In 4H²O, the 4 means...
There are four water molecules all together
In every one water molecule, there are four hydrogen atoms
- 9. Multiple Choice
All together there are __________ hydrogen atoms in 4H²O
8 hydrogen atoms
2 hydrogen atoms
4 hydrogen atoms
16 hydrogen atoms
- 10. Multiple Choice
The law of conservation of mass states
chemical reactions create new atoms
atoms cannot be created or destroyed
reactants vanish once a reaction takes place
products appear when a reaction takes place
- 11. Multiple Choice
The amount of atoms on each side of a chemical equation are
different
the same
- 12. Multiple Choice
When balancing an equation...
only the subscripts can be changed
only the arrow can be changed
only the symbols can be changed
only the coefficients can be changed
- 13. Multiple Choice
Is the following equation balanced?
True
False
- 14. Multiple Choice
How many Potassium (K) atom are there?
1
2
3
4
- 15. Multiple Choice
How many Iron (Fe) and Oxygen (O) are there?
Fe = 1, O = 2
Fe = 2, O = 3
Fe = 2, O = 1
Fe = 1, O = 3
- 16. Multiple Choice
How many Hydrogen (H) and how many Chlorine (Cl) are there?
H = 4, Cl = 1
H = 4, Cl = 0
H = 4, Cl = 3
H = 4, Cl = 4
- 17. Multiple Choice
How many molecules are there?
3
6
12
18
- 18. Multiple Choice
Which of the following is true?
H = 6, So = 4
H = 3, So = 4
H = 6, So = 12
H = 6, So = 2
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