Honors Chemistry Final Review Part 2

Front

How many total atoms are present in the molecule C2H6?

Back

8

Front

What is the law of conservation of mass?

Back

Matter is not created or destroyed in a closed system.

Front

What is the correct proportion of sodium and chlorine in table salt?

Back

1:1

Front

According to Dalton's atomic theory, all matter is made of ________.

Back

Atoms.

Front

How many carbon atoms (C) are in a CO2 molecule?

Back

1.

Front

What is the chemical formula for water?

Back

H2O.

Front

Define a pure substance.

Back

A material with a constant composition and consistent properties.

Front

What is the difference between an element and a compound?

Back

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

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is a chemical reaction?

Back

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