Chemistry Final Review

Front

What is the molecular formula for octane?

Back

C₈H₁₈

Front

How many molecules are in one mole of a substance?

Back

6.022 x 10²³ (Avogadro's number)

Front

What is the definition of a mole in chemistry?

Back

A mole is a unit that measures the amount of a substance, defined as containing exactly 6.022 x 10²³ particles (atoms, molecules, etc.).

Front

What is the mole ratio in the reaction: 2CO + O₂ → 2CO₂?

Back

2:1:2

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.

Front

What is the difference between saturated and unsaturated solutions?

Back

A saturated solution contains the maximum amount of solute that can dissolve at a given temperature, while an unsaturated solution can still dissolve more solute.

Front

What is the definition of a supersaturated solution?

Back

A supersaturated solution contains more solute than can normally dissolve at a given temperature, often achieved by heating the solution and then cooling it.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations ensures that the law of conservation of mass is followed, meaning the number of atoms of each element is the same on both sides of the equation.

Front

What does the term 'reactants' refer to in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change in a reaction.

Front

What does the term 'products' refer to in a chemical reaction?

Back

Products are the substances formed as a result of a chemical reaction.