Answer: B. Rusting of the metal is a chemical change.
Explanation: Rusting is considered a chemical change since it involves a change in the composition of iron through oxidation. Since there is a presence of oxygen and moisture it weakens the bonds of iron molecules to react and form iron oxide another substance in the chemical process.
If you mean the same glucose concentration as the potato then the potato and the solution will be in an Isotonic state where there is no net movement of water by osmosis so no water leaves the potato cells nor water enters the strips cells
hope that helps
20 g/cm3 I got this because 120 divided by 6 is 20