5. A student placed 5.0 grams of baking soda into a small balloon. The mass of the
balloon and soda was measured at 6.0 grams. Next, the student poured a
measure of vinegar into a Florence flask that had an empty mass of 100 grams.
After the balloon was stretched across the top of the flask, the student released
the baking soda into the vinegar. A gas was formed by a chemical reaction that
filled the balloon. After the reaction stopped, the student placed the flask with
the filled balloon on a balance scale, and it measured 125 grams.
What was the mass of the vinegar the student put in the flask at the beginning?
