Question

how many molecules of carbon dioxide (co₂) are there in 0.450 mol of carbon dioxide? (1 point) 6.02 × 10²³ 5.42 × 10²³ 1.34 × 10²⁴ 2.71 × 10²³

Explanation:

Step1: Recall Avogadro's number

Avogadro's number \(N_A = 6.02\times10^{23}\text{ molecules/mol}\)

Step2: Use the formula \(N=n\times N_A\)

Given \(n = 0.450\space mol\), then \(N=0.450\times6.02\times 10^{23}\)

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Answer:

\(2.71\times 10^{23}\) (the fourth option)