Chemistry review

Front

What is the total number of Sulfur atoms in the formula (NH4)2SO4?

Back

1

Front

Matter is anything that...

Back

Has mass and takes up space.

Front

In chemical compounds, covalent bonds form when...

Back

Pairs of electrons are shared between two atoms.

Front

What is the unit for mass of an object?

Back

gram

Front

Is the equation 2H2 + O2 -> 2H2O balanced?

Back

No.

Front

What is the definition of an atom?

Back

The smallest unit of a chemical element that retains its properties.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the pH scale used for?

Back

To measure the acidity or basicity of a solution.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.