What does the conservation of matter imply in a chemical reaction?

Balancing Chemical Reactions Concepts

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Chemistry
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9th - 10th Grade
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Hard

Patricia Brown
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
New atoms are formed in reactions.
Atoms rearrange to form new substances.
Atoms are lost during reactions.
Matter can be created or destroyed.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the reaction between chlorine gas and sodium, what compound is formed?
Sodium sulfate
Sodium chloride
Sodium nitrate
Sodium bicarbonate
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to balance a chemical equation?
To ensure the reaction is fast.
To conserve energy.
To reflect the conservation of matter.
To change the properties of compounds.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of coefficients in balancing chemical equations?
They are used to speed up reactions.
They represent the atomic mass.
They indicate the number of molecules.
They change the chemical identity of compounds.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the term for the small number that indicates the number of atoms in a molecule?
Subscript
Prefix
Exponent
Coefficient
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens if you add an extra oxygen atom to water in a chemical equation?
It becomes hydrogen peroxide.
It becomes hydrogen gas.
It remains water.
It becomes oxygen gas.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you balance the equation for the formation of water?
Add more hydrogen molecules.
Add more water molecules.
Add more oxygen molecules.
Remove oxygen molecules.
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