Law of Conservation of Mass — MCQ Practice
Interactive MCQ Practice
Test your knowledge. Click “Solve” to reveal options, select your answer, then check the result. 6 questions available.
When 10.0 g of calcium carbonate () is heated in a closed container, it decomposes to form calcium oxide () and carbon dioxide (). If 5.6 g of calcium oxide is produced, what is the mass of carbon dioxide formed?
Which of the following statements is NOT consistent with the Law of Conservation of Mass?
A student burns 2.4 g of magnesium ribbon in an open crucible. After the reaction, 4.0 g of magnesium oxide is formed. What is the mass of oxygen from the air that reacted with the magnesium?
In an experiment, 12.0 g of element X reacts completely with 16.0 g of element Y to form a compound XY. What is the total mass of the compound XY formed?
Which of the following scenarios best demonstrates the Law of Conservation of Mass?
When 2.0 g of hydrogen gas reacts with 16.0 g of oxygen gas to form water, what is the total mass of water formed, assuming complete reaction?