Flashcard on the Law of Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that in a closed system, the mass of the reactants must equal the mass of the products in a chemical reaction.

Tags

NGSS.MS-PS1-5

Front

What is an endothermic reaction?

Back

An endothermic reaction is a type of chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

What does the arrow in a chemical equation signify?

Back

The arrow in a chemical equation represents the direction of the reaction, indicating that reactants are producing or yielding products.

Tags

NGSS.MS-PS1-5

Front

How does increasing gas pressure affect the rate of a chemical reaction?

Back

Increasing gas pressure increases the rate of a chemical reaction by bringing reactant molecules closer together, leading to more frequent collisions.

Tags

NGSS.HS-PS1-5

Front

What happens to the mass of substances in an open container during a chemical reaction?

Back

In an open container, the mass of substances may change due to the escape of gases or the absorption of substances from the environment, but the total mass remains constant in a closed system.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is oxidation in terms of oxidation number?

Back

Oxidation is the process in which an element's oxidation number increases, indicating a loss of electrons.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases heat to its surroundings, resulting in an increase in temperature.

Tags

NGSS.HS-PS1-4

Front

What is the role of surface area in chemical reactions?

Back

Increasing the surface area of reactants increases the rate of a chemical reaction by allowing more collisions between reactant particles.

Front

What is the effect of temperature on the rate of a chemical reaction?

Back

Increasing the temperature generally increases the rate of a chemical reaction, as particles move faster and collide more frequently.

Tags

NGSS.HS-PS1-5

Front

What is a combustion reaction?

Back

A combustion reaction is a chemical reaction that occurs when a substance reacts with oxygen, producing heat and light, typically resulting in carbon dioxide and water.

Tags

NGSS.MS-PS1-5