In an experiment, some magnesium ribbon is weighed and its mass is recorded. It is then placed in a crucible and heated. Once ho
t enough, it combines with oxygen to form magnesium oxide (MgO). Observe the data table provided. Why does the law of conservation of mass appear violated?
B) Some of the product escaped as a vapor from the crucible.
Explanation:
Impurities and magnesium not reacting completely would not lead to less product necessarily. Nitrogen gas getting into the crucible would lead to a larger product mass.
C. Reactant and product concentrations in the test tube are different from those in the cell.
Explanation:
Cells convert some of the energy from ATP hydrolysis in to different forms of energy other than heat. ATP energy does not always generate more heat. Many times, energy is used for different purposes.
