The name dinitrogen tetroxide tells you that this compound contains
a.
two nitrogen atoms and two oxygen atoms.
b.
four nitrogen atoms and two oxygen atoms.
c.
two nitrogen atoms and four oxygen atoms.
d.
four nitrogen atoms and four oxygen atoms.

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Shania is trying to determine the oldest geologic unit on this map and the reason to why is she unable to do so is that  the units are all the same age.. when there is the same age, there will be no oldest geologic unit and that i cannot be credible.