Copy of Ivy Tech SCIN 111: Module 5 Mass Changes During Chemical Reactions Lab Part 4: Sara's Explanation Read this to me Sara, a student, suggests the following explanation: When the steel wool burns, it combines with oxygen in the surrounding gas. Oxygen has mass and that is why the scale reading increases. Angela, Sara's lab partner says: If that was true, then the outside scale should also show an increase. If oxygen has mass, then the outside scale should also increase due to the extra mass of the oxygen. Read this to me1. Use evidence from the videos to support Sara or Angela's reasoning. Write your explanation in the space below. Read this to me2. Write an explanation in the space below. Describe how your explanation can be used to correctly explain the outcomes of all the experiments we've seen so far. Read this to me Hint: You don't have to stick with your original explanation. You can choose any explanation that you think correctly explains all the experimental results we've seen so far.