Strontium oxide has a face-centered cubic unit cell of oxide ions with the strontium in octahedral holes.If the radius of Sr2+ is 127 pm and the density of SrO is 4.7 g/cm3,what is the radius of the oxide ion? (100 cm = 1 × 1012 pm)
A) 176 pm
B) 132 pm
C) 127 pm
D) 137 pm
E) 273 pm
Correct Answer:
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