Chapter 19 chemical reactions

What is a chemical formula?

• A detailed description of a chemical reaction

• A chemical shorthand that uses symbols to tell what ratios the elements are in a compound

• A list of all elements in a reaction

• A method to balance chemical equations

What is a chemical reaction?

• A process where substances are mixed without changing

• A change in which one or more substances are converted into new substances

• A method to separate compounds

• A way to measure the mass of a substance

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What are reactants in a chemical reaction?

• The substances that are produced in a chemical reaction

• The substances that react in a chemical reaction

• The symbols used in a chemical formula

• The mass of one mole of substance in grams

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What is a balanced chemical equation?

• An equation with more products than reactants

• An equation with the same number of atoms of each element on both sides

• An equation that uses only one reactant

• An equation that describes a physical change

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Who is known as the Father of Modern Chemistry?

• Isaac Newton

• Albert Einstein

• Antoine Lavoisier

• Marie Curie

What did Lavoisier contribute to the naming of compounds?

• Developed a random naming system.

• Used colors to name compounds.

• Developed a consistent system of naming substances.

• Named compounds after himself.

Which of the following is a chemical equation for the reaction of zinc and sulfur?

• Zn + S → ZnS

• Zn + O → ZnO

• Zn + Cl → ZnCl

• Zn + H → ZnH

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What are the four states of matter mentioned in the document?

• Solid, Liquid, Gas, Plasma

• Solid, Liquid, Gas, Aqueous

• Solid, Liquid, Gas, Vapor

• Solid, Liquid, Gas, Ice

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What are the three conditions that may be required for a reaction to occur?

• Pressure, Volume, Temperature

• Heat, Light, Electricity

• Mass, Density, Volume

• Speed, Distance, Time

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What does the coefficient in a chemical equation represent?

• The number of molecules

• The number of atoms in a molecule

• The number of moles of a substance

• The number of electrons