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(53) What fraction of calcium atoms lies on the surface of a cubic crystal that is 1.0 cm in length? Calcium has fec lattice with edge length of 0.556 nm. a) 1.94 x 10-7 b) 1.67 x 10-7 d) 3.88 x 10-15 na OSS c) 1.94 x 10-15

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