In an open container, the measured mass after a reaction is lower because a gas produced escapes. Which conclusion is correct?
Answer and explanation
Correct answer: The mass of the escaped gas was not included in the final measurement
In an open container, a gas produced during the reaction may escape, so the measured mass of the material remaining in the container appears lower. This does not mean that mass was destroyed; when the escaped gas is included, the total mass of the system is conserved. Unlike option A, the gas mass was simply excluded from the final measurement.
Frequently asked questions
What is the correct answer to this question?
The mass of the escaped gas was not included in the final measurement
Why is this the correct answer?
In an open container, a gas produced during the reaction may escape, so the measured mass of the material remaining in the container appears lower. This does not mean that mass was destroyed; when the escaped gas is included, the total mass of the system is conserved. Unlike option A, the gas mass was simply excluded from the final measurement.
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.
