CHE 1100: College Chemistry Lecture Notes

These flashcards cover the key concepts from the CHE 1100: College Chemistry lecture notes, focusing on definitions and properties related to matter, measurements, and significant figures.

Matter

Anything that occupies space and has mass.

Solid

Has a fixed shape and volume.

Liquid

Takes the shape of its container, has a fixed volume, and forms a horizontal surface.

Gas

Expands to fill its container.

Law of Conservation of Matter

Matter cannot be created nor destroyed.

Element

A pure substance that cannot be broken down into simpler substances by chemical changes.

Compound

A pure substance that can be broken down into simpler substances by chemical changes.

Homogeneous mixture

A mixture with a uniform composition, also called a solution.

Heterogeneous mixture

A mixture with a non-uniform composition.

Physical Property

A characteristic of matter that is not associated with a change in its chemical composition.

Chemical Property

A characteristic of matter that is associated with a change in its chemical composition.

Extensive Property

A property that depends on the amount of matter present.

Intensive Property

A property that does not depend on the amount of matter present.

SI Unit for Length

Meter (m).

SI Unit for Mass

Kilogram (kg).

SI Unit for Time

Second (s).

SI Unit for Temperature

Kelvin (K).

Density

The ratio of mass to volume of an object.

Volume

The amount of space occupied by an object.

Significant Figures

Digits in a number that contribute to its precision.

Accuracy

How close a measured value is to the true value.

Precision

How close replicate measurements are to each other.

Exact Numbers

Counting numbers that do not have uncertainty.

Uncertainty in Measurements

The doubt that exists about the result of a measurement.

Rounding Rule

In multiplication or division, the result carries the same number of significant figures as the factor with the fewest significant figures.