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Chemical Equations and Formulae Quiz

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Questions and Answers

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?

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?

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?

<p>To ensure that the number of atoms of each element remains the same before and after a chemical reaction</p> Signup and view all the answers

Chemical Equations and Formulae Quiz

Choose a study mode

Podcast

Questions and Answers

What is the purpose of using chemical formulae in a chemical equation?

According to the law of conservation of mass, what happens to mass in a chemical reaction?

How can you tell if a chemical equation is balanced?

Why is it necessary to balance a skeletal chemical equation?

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