Semester 1 Final Exam

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include oxygen (O) and hydrogen (H).

Front

What is the chemical formula for sulfuric acid?

Back

H₂SO₄

Front

How many atoms are in a molecule of water (H₂O)?

Back

There are 3 atoms in a molecule of water: 2 hydrogen (H) atoms and 1 oxygen (O) atom.

Front

What does the Law of Conservation of Mass state?

Back

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction.

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 is the difference between a compound and a mixture?

Back

A compound is a substance formed when two or more elements are chemically bonded together, while a mixture is a combination of two or more substances that are not chemically bonded.

Front

What is a molecule?

Back

A molecule is the smallest unit of a chemical compound that retains its chemical properties, consisting of two or more atoms bonded together.

Front

What is the definition of a transverse wave?

Back

A transverse wave is a wave in which the medium moves perpendicular to the direction of the wave's travel.

Front

What is the definition of a longitudinal wave?

Back

A longitudinal wave is a wave in which the medium moves parallel to the direction of the wave's travel.

Front

What is the chemical symbol for sulfur?

Back

The chemical symbol for sulfur is S.