How many chromium atoms are in 78.8 g or K2Cr2O7?
A) 2.24 × 1024 atoms
B) 1.12 × 1024 atoms
C) 3.23 × 1023 atoms
D) 1.61 × 1023 atoms
E) 2.25 × 1022 atoms
Correct Answer:
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