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Questions and Answers
What is the purpose of using chemical formulae in a chemical equation?
What is the purpose of using chemical formulae in a chemical equation?
- To complicate the equation
- To confuse the reader
- To make the equation more concise and useful (correct)
- To increase the length of the equation
According to the law of conservation of mass, what happens to mass in a chemical reaction?
According to the law of conservation of mass, what happens to mass in a chemical reaction?
- Mass decreases in a chemical reaction
- The mass depends on the type of elements involved
- Mass can be created or destroyed
- The total mass remains the same before and after a chemical reaction (correct)
How can you tell if a chemical equation is balanced?
How can you tell if a chemical equation is balanced?
- By using a calculator to check the mass on both sides
- By counting and comparing the number of atoms of each element on both sides of the arrow (correct)
- By randomly guessing if it looks balanced
- By memorizing the equation
Why is it necessary to balance a skeletal chemical equation?
Why is it necessary to balance a skeletal chemical equation?
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