Chemistry Semester One Final Review

Front

What is the equation to measure change in Thermal Energy?

Back

Q = mc∆t, where Q is the change in thermal energy, m is the mass, c is the specific heat capacity, and ∆t is the change in temperature.

Front

Is water an element?

Back

False. Water is a compound made of hydrogen and oxygen.

Front

How do you calculate the density of an object?

Back

Density = mass/volume.

Front

What is an example of a homogeneous mixture?

Back

Perfume is a homogeneous mixture because it has a uniform composition.

Front

What is an example of a heterogeneous mixture?

Back

Chex mix is a heterogeneous mixture because its components are not uniformly distributed.

Front

Define a compound in chemistry.

Back

A compound is a substance formed when two or more elements are chemically bonded together.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

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.

Front

What is the formula for calculating specific heat capacity?

Back

Specific heat capacity (c) = Q / (m * ∆t), where Q is the heat added, m is the mass, and ∆t is the change in temperature.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.