A flask with vinegar in it has a mass of 160 grams. A balloon with baking soda in it has a mass of 40 grams. The balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. The balloon inflates to a large volume. What will the total mass of the balloon and flask be after the balloon inflates? Explain.

Responses
A Less than 200 grams because the solid baking soda disappears.Less than 200 grams because the solid baking soda disappears.
B 200 grams, because all the atoms remain in the balloon or flask.200 grams, because all the atoms remain in the balloon or flask.
C More than 200 grams because the size of the balloon is so much larger.More than 200 grams because the size of the balloon is so much larger.
D Less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.Less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.

C. More than 200 grams because the size of the balloon is so much larger.

When vinegar (acetic acid) reacts with baking soda (sodium bicarbonate), it produces carbon dioxide gas, water, and a salt. The gas produced inflates the balloon, increasing the total volume of the system. The total mass of the balloon and flask after the reaction will be more than 200 grams because the mass of the gases produced (such as the carbon dioxide in the balloon) adds to the original mass of the vinegar and baking soda in the flask.