How Many Chromium Atoms Are in 78

question 12

Multiple Choice

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

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