Entry Exam Category: Graduate & Professional Program Admission Exams
Course: Praxis
Exam: Praxis Elementary Science 5005 Practice Test
Practice Question
A reaction occurs between two liquid substances in a sealed container. Based on the law of conservation of mass, what will happen to the mass of the sealed container and its contents overall?
Answer Choices
- A: If the reaction produces a gas, the mass will decrease.
- B: If the reaction produces a solid, the mass will increase.
- C: If the reaction produces a liquid, the mass will increase as well.
- D: No matter what the reaction produces, the mass will remain the same.
Correct Answer: D
Rationale: Mass conserved in sealed system. A,B,C: Violate conservation. Products stay inside, mass same.