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15-09-2022
Chemistry

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3. How many oxygen atoms are present in 0.5 mole of pentahydrated copper(II) sulfate,
CuSO4.5H₂O? (Avogadro's constant = 6 x 10²³ mol ¹)
A. 2.5
B. 4.5
C. 3.0 x 10²³
D. 2.7 x 10^24

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