Understanding the Law of Conservation of Mass

What is the fundamental principle of the Law of Conservation of Mass?

• Mass is always greater on the product side.

• The mass of reactants is equal to the mass of products.

• Mass is always greater on the reactant side.

• Mass can be created or destroyed in a chemical reaction.

In a chemical reaction, if you start with 10 grams of A and 12 grams of B, and 8 grams of C is produced, how much of D is formed?

• 14 grams

• 10 grams

• 8 grams

• 12 grams

If you have 9 grams of X and 6.5 grams of Y, and the total mass of products is 34.3 grams, what is the mass of Z?

• 18.8 grams

• 34.3 grams

• 25.3 grams

• 27.8 grams

How does the Law of Conservation of Mass apply when using a calculator for mass calculations?

• It is not applicable when using a calculator.

• It ensures both sides of the equation are balanced.

• It allows for estimation of mass.

• It helps in predicting the type of reaction.

In a reaction where 7 grams of element X and 9 grams of element Y produce 4 grams of element Z, what is the mass of element Q?

• 9 grams

• 7 grams

• 16 grams

• 12 grams