I need help with a science project here is what the questions are like:
If you could measure the mass of the substances inside the cup in Part I before and after the reaction, you would see that the mass decreased over the course of the reaction. Based on your observations in Part I and II, explain this difference in mass for the unsealed cup.

What caused the bubbles in the reaction?

If you were to measure the mass before and after the reaction in Part II, you would see that mass was conserved. Explain why the Law of Conservation of Mass seemed to be obeyed in Part II

Question

I need help with a science project here is what the questions are like: 
    If you could measure the mass of the substances inside the cup in Part I before and after the reaction, you would see that the mass decreased over the course of the reaction. Based on your observations in Part I and II, explain this difference in mass for the unsealed cup.

What caused the bubbles in the reaction?

 If you were to measure the mass before and after the reaction in Part II, you would see that mass was conserved. Explain why the Law of Conservation of Mass seemed to be obeyed in Part II

commonlizer · Answer

Here are the materials that are needed in the project:

    Baking soda
    Vinegar
    Measuring cup
    Measuring spoons
    One latex balloon
    One paper or plastic disposable cup
    One clear (0.5 L) plastic water bottle or soda bottle (empty and clean)
    One marker
    One small funnel (optional)

soprano.h.d0816 · Answer

Hey there!!! Since you are new here, read this tutorial for new OpenStudiers!! http://openstudy.com/study#/updates/543de42fe4b0b3c6e146b5e8 You might not have known, but you are in the "OpenStudy Feedback" section. Place your mouse over where it says OpenStudy Feedback, and find the correct subject by clicking the 'Find More Subjects' button or simply clicking the correct subject in the list that you have already studied! Please enjoy being on OpenStudy. And don’t forget to read OpenStudys’ Code of Conduct and also, OpenStudy's Terms and Conditions :D This section is for providing your Feedback/Appreciation regarding the site and by Feedback, we mean "helpful information or criticism that is given to someone to say what can be done to improve a product( which is the site in this case)" You can use this section: ⇝ If you want to appreciate to OpenStudy ⇝ To share your thoughts on how to improve OpenStudy ⇝ To inform the site about any difficulty you are facing while using OpenStudy ⇝ To ask any other question related to this site. ⇝ If you want to post any posts such as congratulating someone, saying Happy Birthday, etc. If you have any questions, please feel free to PM me or tag me in your post :D

commonlizer · Answer

Sorry thanks four help Soprano.h.D0816