Chemical Reactions Quiz

An abbreviation that represents the name of an element

• chemical formula

• chemical symbol

• chemical equation

• chemical reaction

It is the shorthand of expressing the types and the number of atoms present in a substance.

• chemical formula

• chemical symbol

• chemical compound

• chemical reaction

It is a process in which one or more substances, the reactants, are converted to one or more different substances, the products.

• chemical formula

• chemical symbol

• chemical equation

• chemical reaction

It is a symbolic representation of chemical reaction, with reactants and products.

• chemical formula

• chemical symbol

• chemical compound

• chemical equation

In the equation, what coefficient is placed before CO2​ to balance the equation? C3​H8​ + O2 ​→ CO2 ​+ H2​O

• 1

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• 4

In the equation shown, what is the coefficient of HCl to balance the reaction? Zn + HCl → ZnCl2 ​+ H2​

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In the given balanced equation, what is the coefficient for NaOH? NaOH + HCl → NaCl + H2​O

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In a chemical reaction, substances are often represented with their physical states. Which of the following correctly identifies the physical states in the reaction? H2​O(l) + CO2​(g) → H2​CO3​(aq)

• H2​O is a gas, CO2​ is a solid, and H2​CO3​ is a liquid.

• H2​O is a liquid, CO2​ is a gas, and H2​CO3 is aqueous.

• H2​O is aqueous, CO2​ is liquid, and H2​CO3 is a solid.

• H2​O is solid, CO2​ is aqueous, and H2​CO3 is a gas.

In the following reaction, which physical state labels are correct? NaCl(s) + H2​O(l) → Na+(aq) + Cl−(aq)

• NaCl is a solid, H2O is a liquid, and both Na+ and Cl- are gases.

• NaCl is aqueous, H2O is solid, and both Na+ and Cl- are liquid.

• NaCl is a solid, H2O is a liquid, and both Na+ and Cl- are aqueous.

• NaCl is a gas, H2O is aqueous, and both Na+ and Cl- are solid.

Where should the reactants be written in a chemical equation?

• left side of the equation

• right side of the equation

• anywhere