Balancing Equations I Formative

Front

What is a balanced equation?

Back

A balanced equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved during a chemical reaction.

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Front

Is the equation HCl + NaOH --> NaCl + H2O balanced?

Back

Yes, it is balanced.

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Front

How many atoms of oxygen are in NH4OH?

Back

1

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NGSS.MS-PS1-1

Front

How many atoms of hydrogen are in the products of the reaction HCl + NaOH --> NaCl + H2O?

Back

2

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Front

How many atoms of hydrogen are in NH4OH?

Back

5

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NGSS.MS-PS1-1

Front

How many atoms of carbon are in 2C2H6?

Back

4

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NGSS.MS-PS1-1

Front

What does it mean to balance a chemical equation?

Back

To balance a chemical equation means to adjust the coefficients in front of the compounds to ensure that the number of atoms for each element is the same on both sides.

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NGSS.MS-PS1-5

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

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NGSS.MS-PS1-5

Front

What are coefficients in a chemical equation?

Back

Coefficients are the numbers placed in front of compounds in a chemical equation to indicate how many molecules or moles of each reactant and product are involved.

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NGSS.MS-PS1-5

Front

What is the total number of atoms in the reactants of the equation HCl + NaOH?

Back

There are 3 atoms (1 H from HCl, 1 Cl from HCl, 1 Na from NaOH, and 1 O from NaOH).

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NGSS.MS-PS1-1

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