Answer:
D) Previous models
Got it right on USTestPrep
Answer:
Because X-rays have wavelengths similar to the size of atoms
Answer: they all relate to eachother
Explanation: every star every planet every sun its hard to belive they relate
to eachother but only becuase there in the same UNIVERSE
Not sure about the number of significant figures; you can decide where to round, but I would probably say 0.075mol.