1.1.4 Conservation of Mass

• The Law of Conservation of Mass is crucial in balancing chemical equations
• The total mass of reactants equals the total mass of products in a chemical reaction


  True
• What is the relationship between the mass of reactants and products in a chemical reaction?

  They are equal
• In a chemical reaction, mass is created or destroyed according to the Law of Conservation of Mass.

  False
• The mass of reactants is always less than the mass of products in a chemical reaction.

  False
• During a chemical reaction, mass can be created or destroyed according to the Law of Conservation of Mass.

  False
• If the total mass of products is less than the total mass of reactants, it may indicate an error in the experiment.


  True
• The Law of Conservation of Mass can be used to verify the accuracy of experimental results.


  True
• In a chemical reaction, the mass of the reactants is equal to the mass of the products


  True
• What is an example of the Law of Conservation of Mass in action?

  Burning 100 g of wood
• The Law of Conservation of Mass ensures the number of atoms for each element remains the same when balancing chemical equations
• What does the Law of Conservation of Mass state?

  Mass of reactants equals products
• What is the total mass of the products in a chemical reaction if the total mass of the reactants is 50 g?

  50 g
• In the burning of wood example, what is the mass of the reactants if the mass of the products is 100 g?

  100 g
• What type of calculations is the Law of Conservation of Mass used in?

  Stoichiometric calculations
• The Law of Conservation of Mass allows chemists to determine the quantities of reactants and products in a chemical reaction.
• What does the Law of Conservation of Mass state?

  Mass is neither created nor destroyed
• What happens to mass during a chemical reaction according to the Law of Conservation of Mass?

  It remains constant
• Match the reaction with its example of mass conservation:

  Burning of wood ↔️ 100 g reactants = 100 g products

  Dissolving sugar in water ↔️ 50 g reactants = 50 g products

  Rusting of iron ↔️ 10 g reactants = 10 g products
• The Law of Conservation of Mass is crucial for balancing chemical equations


  True
• The Law of Conservation of Mass is crucial in balancing chemical equations
• The Law of Conservation of Mass ensures that the number of atoms for each element is the same on both sides of a chemical equation.
• The Law of Conservation of Mass is used to balance chemical equations
• In the reaction 2Na + 2HCl → 2NaCl + H₂, which atoms must be balanced according to the Law of Conservation of Mass?

  Na, Cl, and H
• If 10 g of sodium reacts with 20 g of hydrochloric acid, what does the Law of Conservation of Mass allow chemists to calculate?

  Mass of sodium chloride