Chemistry Test Review

Front

Which of the following represents an element? H2O, H2, NaCl, CaCO3

Back

H2 is an element, as it consists of only one type of atom.

Front

What is the formula for density?

Back

Density = mass / volume.

Front

Made up of one type of material throughout: mixture, pure substance, soluble, insoluble

Back

A pure substance is made up of only one type of material throughout.

Front

Which of the following is not a compound? HCl, Cl, NaCl, CO2

Back

Cl is not a compound; it is an element.

Front

Flammable means: puts out a fire, sinks to the ground in air, rises higher in the air, easily set on fire

Back

Flammable means easily set on fire.

Front

What is a compound?

Back

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

Front

What is the difference between a mixture and a compound?

Back

A mixture is a combination of two or more substances that retain their individual properties, while a compound is a substance formed from two or more elements that are chemically bonded.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

Front

What does soluble mean?

Back

Soluble means a substance can dissolve in a solvent, such as salt in water.

Front

What is the pH scale?

Back

The pH scale measures how acidic or basic a solution is, ranging from 0 (acidic) to 14 (basic), with 7 being neutral.