Answer: A or B
Explanation:
1. Calculate the mass of the gas, if you know its density and volume. ...
2. Use a scale to find the mass instead. Put just a small piece of double-sided tape at the center of the scale and zero it.
3. Weigh the container you want to fill with gas. You can weigh an empty balloon if you want, or use another container (such as a jug).
4. Fill the container with gas. Inflate the balloon or fill the container with your gas. If you’re measuring air, inflate the balloon with your mouth.
5. Place the inflated container on the scale. The double-sided tape will help hold the balloon or container down, if necessary.
