conservation of mass

• What is the law of conservation of mass?

  No atoms are lost or made during a chemical reaction.
• How does the law of conservation of mass apply to chemical reactions?

  The mass of the products equals the mass of the reactants.
• If 24 grams of magnesium reacts with 71 grams of chlorine, what is the mass of magnesium chloride produced?

  95 grams
• What are the reactants in the reaction where magnesium reacts with chlorine?

  Magnesium and chlorine
• What are the products formed when magnesium reacts with chlorine?

  Magnesium chloride
• If 92 grams of sodium reacts with 32 grams of oxygen, what is the mass of sodium oxide produced?

  124 grams
• How do you calculate the mass of calcium carbonate that reacted if 112 grams of calcium oxide and 88 grams of carbon dioxide were produced?

  The mass of calcium carbonate is 200 grams.
• In the reaction producing 95 grams of magnesium chloride and 18 grams of water, what is the mass of magnesium oxide that reacted?

  40 grams
• What is the total mass of products if 95 grams of magnesium chloride and 18 grams of water are produced?

  113 grams
• What is the process to calculate the mass of reactants in a chemical reaction?

  • Identify the mass of products formed.
  • Use the law of conservation of mass.
  • Set the total mass of reactants equal to the total mass of products.
• What types of questions can you expect regarding mass calculations in chemical reactions?

  • Calculate mass of products from reactants.
  • Calculate mass of reactants from products.
  • Identify reactants and products in a reaction.