Balancing Equations Mastery Quiz

What is the purpose of balancing chemical equations?

• To make sure the chemical reaction can happen in real life.

• To ensure that the same number of each type of atom appears on both sides of the equation.

• To change the properties of the chemicals involved.

• To speed up the reaction.

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NGSS.MS-PS1-5

• 2 before, 2 after

• 4 before, 4 after

• 2 before, 4 after

• 4 before, 2 after

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NGSS.MS-PS1-2

• 3

• 4

• 5

• 6

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When balancing a chemical equation, what can you change to achieve balance?

• Subscripts in the chemical formulas

• Coefficients in front of the chemical formulas

• The types of atoms in the chemical formulas

• The physical states of the chemicals

• 2

• 3

• 4

• 6

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NGSS.MS-PS1-1

What does it mean if a chemical equation is balanced?

• It can only occur in a laboratory setting.

• The equation is not possible to occur in real life.

• The mass and the number of atoms are conserved in the reaction.

• The reaction happens instantly.

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NGSS.MS-PS1-5

• 3

• 6

• 9

• 12

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Which of the following is a correctly balanced equation?

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NGSS.MS-PS1-5

• 1

• 2

• 3

• 4

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When counting atoms in a balanced equation, what is the correct way to determine the total number of atoms for each element?

• Count the number of atoms in the reactants and products separately and then add them together.

• Multiply the coefficient of each substance by the number of atoms of each element in its formula.

• Only count the atoms in the reactants because they are the ones that react.

• Assume all coefficients are 1 and count the atoms based on the chemical formula alone.

Tags

NGSS.MS-PS1-5