Is Oz a mass or volume?

Related questions

1. How do you convert fluid ounces to ounces?
2. How much mL is a water bottle?
3. Is it OK to drink a gallon of water a day?
4. How tall is a 16 oz water bottle?
5. Are liquid and dry cups the same?
6. What are dry measurements?
7. Is Oz same as Fl Oz?
8. How much does a 2 liter bottle weight empty?
9. What is the 30 day water challenge?
10. How much is a normal water bottle?

Tags

1. #avoirdupois
2. #symbol
3. #ounce
4. #measurement
5. #systems
6. #pound
7. #abbreviated
8. #weight
9. #british
10. #customary
11. #derived
12. #united
13. #common
14. #approximately
15. #apothecary
16. #imperial
17. #volume
18. #states