Chemical Reactions & Matter

Front

What is density?

Back

Density is the mass of an object divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

How can density help identify gases?

Back

By comparing the density of an unknown gas to the density of air, we can determine if it will rise or sink.

Front

What is flammability?

Back

Flammability is the ability of a substance to catch fire and burn easily.

Front

What indicates a chemical reaction has occurred?

Back

The production of a new gas, a change in color, or a temperature change can indicate a chemical reaction.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

Give an example of a physical change.

Back

Examples include melting ice, boiling water, or dissolving sugar in water.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What are reactants?

Back

Reactants are the starting materials in a chemical reaction that undergo change.

Front

What are products in a chemical reaction?

Back

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

Front

What is the law of conservation of mass?

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