Which arrangement is most suitable for demonstrating the law of conservation of mass experimentally?
Answer and explanation
Correct answer: Measuring the mass of the entire closed container and its contents before and after the reaction
According to the law of conservation of mass, the total mass remains constant in a chemical reaction if no substance leaves or enters the system. When the mass of the entire closed container and its contents is measured before and after the reaction, all products, including any gas, remain in the system; therefore, the two masses are equal. In an open container, a gas may escape, making the measured mass appear smaller.
Frequently asked questions
What is the correct answer to this question?
Measuring the mass of the entire closed container and its contents before and after the reaction
Why is this the correct answer?
According to the law of conservation of mass, the total mass remains constant in a chemical reaction if no substance leaves or enters the system. When the mass of the entire closed container and its contents is measured before and after the reaction, all products, including any gas, remain in the system; therefore, the two masses are equal. In an open container, a gas may escape, making the measured mass appear smaller.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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