Question
Vinegar and baking soda are put in a beaker together, and they undergo a chemical reaction. Look at the picture. How do you know a chemical reaction is occurring?
(1 point)
Responses
Changes shape
Changes shape
Bubbles are produced
Bubbles are produced
Changes size
Changes size
There is no chemical reaction. This is a physical change.
There is no chemical reaction. This is a physical change.
Question 5
Using the same image of the vinegar and baking soda chemical reaction... A scientist finds that the total mass after the compounds react, is less than the sum of the masses before they react. Which 2 statements explain this observation.
(1 point)
Responses
Some of the mass has escaped as a gas.
Some of the mass has escaped as a gas.
Some of the mass was destroyed during the reaction.
Some of the mass was destroyed during the reaction.
Law of conservation of mass. Mass can not be created nor destroyed.
Law of conservation of mass. Mass can not be created nor destroyed.
There is no way the mass can be different
(1 point)
Responses
Changes shape
Changes shape
Bubbles are produced
Bubbles are produced
Changes size
Changes size
There is no chemical reaction. This is a physical change.
There is no chemical reaction. This is a physical change.
Question 5
Using the same image of the vinegar and baking soda chemical reaction... A scientist finds that the total mass after the compounds react, is less than the sum of the masses before they react. Which 2 statements explain this observation.
(1 point)
Responses
Some of the mass has escaped as a gas.
Some of the mass has escaped as a gas.
Some of the mass was destroyed during the reaction.
Some of the mass was destroyed during the reaction.
Law of conservation of mass. Mass can not be created nor destroyed.
Law of conservation of mass. Mass can not be created nor destroyed.
There is no way the mass can be different
Answers
GPT-4o mini
### Question 4
**How do you know a chemical reaction is occurring?**
The correct response is:
- **Bubbles are produced**
This indicates a gas is forming, which is a sign of a chemical reaction.
---
### Question 5
**Which 2 statements explain the observation that the total mass after the compounds react is less than the sum of the masses before they react?**
The correct responses are:
- **Some of the mass has escaped as a gas.**
- **Law of conservation of mass. Mass cannot be created nor destroyed.**
The first statement explains that gas during the reaction can escape the system, leading to a loss in measured mass, while the second statement emphasizes that mass is conserved in a closed system, hence it can’t be destroyed or created, just transformed.
**How do you know a chemical reaction is occurring?**
The correct response is:
- **Bubbles are produced**
This indicates a gas is forming, which is a sign of a chemical reaction.
---
### Question 5
**Which 2 statements explain the observation that the total mass after the compounds react is less than the sum of the masses before they react?**
The correct responses are:
- **Some of the mass has escaped as a gas.**
- **Law of conservation of mass. Mass cannot be created nor destroyed.**
The first statement explains that gas during the reaction can escape the system, leading to a loss in measured mass, while the second statement emphasizes that mass is conserved in a closed system, hence it can’t be destroyed or created, just transformed.