Question 7.CC.4: How many moles of nickel contain 2.45 × 10^24 Ni atoms?...
How many moles of nickel contain 2.45 × 10^{24} Ni atoms?
Step-by-Step
\underset{\text{Three SFs}}{ 2.45 \times 10^{24}\ \cancel{Ni \text { atoms }}} \times \frac{\overset{\text{Exact}}{1\ mole\ Ni} }{\underset{\text{Three SFs}}{6.02 \times 10^{23}\ \cancel{Ni \text { atoms }}}}
\begin{gathered} =4.07 \text { moles of } Ni \\ \text { Three SFs } \end{gathered}
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