Balancing Chemical Equations Review

Front

How many phosphorus atoms are in PO₄?

Back

1

Tags

NGSS.MS-PS1-1

Front

In chemical reactions, what does the principle of conservation of mass mean?

Back

Matter is not created or destroyed.

Tags

NGSS.MS-PS1-5

Front

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

Back

The mass is the same.

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NGSS.MS-PS1-5

Front

What is the little number after an element in a chemical equation called? Example: H₂

Back

Subscript

Front

What is a coefficient?

Back

The large number to the left of a formula.

Tags

NGSS.MS-PS1-5

Front

What is a chemical equation?

Back

A representation of a chemical reaction using symbols and formulas.

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NGSS.MS-PS1-5

Front

What does it mean to balance a chemical equation?

Back

To ensure the number of atoms for each element is the same on both sides of the equation.

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NGSS.MS-PS1-5

Front

What is the role of reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change.

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NGSS.MS-PS1-2

Front

What are products in a chemical reaction?

Back

Products are the substances formed as a result of a chemical reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the difference between a coefficient and a subscript?

Back

A coefficient indicates the number of molecules, while a subscript indicates the number of atoms in a molecule.

Tags

NGSS.MS-PS1-1