- A balance is a kind of tool
- A balance is used for measuring the mass of an object
- Therefore, a balance is a kind of tool used for measuring the mass of an object

Hence, a balance is a kind of tool used for measuring the mass of an object
[Question]What tool is used to determine the mass of an object?
[Context]- A balance is a kind of tool 
- A balance is used for measuring the mass of an object