Chromium (Cr) is a metal that is added to steel to improve its resistance to corrosion. Calculate the number of moles in a sample of chromium containing $5.00 \times 10^{20}$ atoms and the mass of the sample.
Added by Ray B.
Step 1
Given: Number of atoms = $5.00 \times 10^{20}$ atoms Avogadro's number = $6.022 \times 10^{23}$ atoms/mol Number of moles = $\frac{5.00 \times 10^{20} \text{ atoms}}{6.022 \times 10^{23} \text{ atoms/mol}} = 8.30 \times 10^{-4}$ moles Show more…
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