Law of conservation of mass

Front

What is the measure of the amount of matter?

Back

Mass

Front

In a reaction A + B ----> C, if reactant A has 5g and product C has 9g, how many grams does reactant B have?

Back

4g

Front

What is a molecule?

Back

A group of atoms bonded together.

Front

If 24 g of magnesium reacts with 38 g of fluorine, what is the mass of magnesium fluoride produced?

Back

62 g

Front

If a reaction starts with 20g of reactants, what should be the total mass of products?

Back

20g of products.

Front

What does the law of conservation of mass state?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force of gravity acting on that mass.

Front

What is a reactant in a chemical reaction?

Back

A substance that undergoes change during a reaction.

Front

What is a product in a chemical reaction?

Back

A substance that is formed as a result of a chemical reaction.

Front

What is the role of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in a reaction.