Correct Answer: Option C

Explanation

1 mole = \(6.02 \times 10^{23}\)

2.5 moles = \(6.02 \times 10^{23} \times 2.5\)

= \(15.05 \times 10^{23} = 1.505 \times 10^{24}\)

\(\approxeq 1.5 \times 10^{24}\)

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