Ling is learning about chemical reactions in science class. She measured out 45 grams of vinegar and 10 grams of baking soda. When she mixed them together, a bubbling reaction occurred. After the reaction stopped, she weighed the mixture and found that it weighed 54 grams. Which of the following best explains why the mixture weighed less than the original ingredients?

A
Some of the vinegar evaporated during the experiment.

B
The chemical reaction created a gas that left the mixture.

C
The new solution is less dense than vinegar or baking soda.

D
The baking soda is floating on top of the vinegar.

B

The chemical reaction created a gas that left the mixture.