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Chemical Changes vs Physical Changes Quiz

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Chemical Changes vs Physical Changes Quiz

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Questions and Answers

What is the purpose of chemical equations in representing chemical reactions?

To provide a detailed explanation of the reaction mechanism

To show the stoichiometry of the reaction (correct)

To illustrate the temperature changes during the reaction

To represent the isotopes involved in the reaction

Who is credited with formulating chemical equations first?

Antoine Lavoisier

Marie Curie

Jean Beguin (correct)

Dmitri Mendeleev

What do we call the initial substances in a chemical reaction?

Reactants (correct)

Intermediates

Products

Catalysts

What symbol is used in chemical equations to represent a state of chemical equilibrium?

<=> (D) Signup and view all the answers

In a chemical equation, what does the symbol '→' indicate?

The net forward reaction (B) Signup and view all the answers

What is a concise way of representing a chemical reaction?

Chemical equation (B) Signup and view all the answers

Which term refers to the final substances formed in a chemical reaction?

Products (C) Signup and view all the answers

What can separate the reactants and products in a chemical equation?

= (D) Signup and view all the answers

'2H2+O2→2H2O' represents a chemical reaction. What does '2H2' signify in this equation?

2 molecules of hydrogen gas (A) Signup and view all the answers

'2Na(s) + Cl2 → 2NaCl(s)' is an example of which type of reaction?

Synthesis (C) Signup and view all the answers