February 25

Science 10 — lab

  1.  Here is the picture of products.lab
  2. The mass of the bag: 1.9g
  3. The mass of the chemical A: 2.3g
  4. The mass of the chemical B: 1.9g
  5. The mass of the chemical C: 0.5g
  6. The total mss of the products: 5.6g-1.9=3.7g
  7. The total mass of the reactants: 2.3g+1.9+0.5g=4.7g

We lost the mass. I think the reason must be there still some chemicals did not react completely, or even had some chemicals left in the weight boat.