You happen to be visiting northem california and you are driving by suisun bay, a notorious graveyard for old ships you notice that all of these ships appear to be nusting may which of the following statements is true?

a. the rusting of the metal is neither a chemical change nor a physical change
b. the rusting of the metal is a chemical change
c. the rusting of the metal is both a chemical change and a physical change
d. the rusting of the metal is a physical change

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.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.