Chem final Mr. A

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved during the reaction.

Front

What is a chemical change?

Back

A transformation that results in the creation of new substances, often accompanied by energy changes.

Front

What is a physical property?

Back

A characteristic of a substance that can be observed or measured without changing its chemical composition, such as state of matter, color, or density.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the charge of a neutron?

Back

Neutral.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, matter is neither created nor destroyed; the total mass of reactants equals the total mass of products.

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 formula for calculating the number of moles?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of each reactant and product involved in the reaction.