Each pure element has certain chemical properties, a specific atomic arrangement and a specific crystalline structure that distinguish this pure element from other elements.
On the other hand, the mass of any substance/object depends on the AMOUNT or the QUANTITY of matter in the object.
Based on the above, three objects made of pure iron would have:
Different masses
Same arrangement of atoms
Same crystal structure
Same chemical properties
Comparing the above to the given choices, we would find that the best choice is:
b. They have the same chemical properties
Australia separated from other continents and species there evolved independently
Answer: one atmosphere!
Explanation: The normal boiling point of a liquid is the temperature at which its vapor pressure is equal to one atmosphere (760 torr). I hope this answers your questionl.