Question

correct the mole establishes a relationship between moles of atoms and the number of a 6.022×10²³ atoms/1 mol) to cancel the units of mol and leave the units of at part c 25.4 mol hg express your answer using three significant figures. n = 1.53×10²⁵ atoms previous answers correct the mole establishes a relationship between moles of atoms and the number of atoms (avo 6.022×10²³ atoms/1 mol) to cancel the units of mol and leave the units of atoms in the part d 0.215 mol na express your answer using three significant figures. n = atoms

Explanation:

Step1: Use Avogadro's number formula

The formula to find the number of atoms \(N\) is \(N = n\times N_{A}\), where \(n\) is the number of moles and \(N_{A}=6.022\times 10^{23}\text{ atoms/mol}\). Given \(n = 0.215\text{ mol}\) of \(Na\).

Step2: Substitute values into the formula

\(N=0.215\text{ mol}\times6.022\times 10^{23}\text{ atoms/mol}\)

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Step3: Round to three significant figures

Rounding \(1.29473\times 10^{23}\) to three significant figures gives \(1.29\times 10^{23}\text{ atoms}\)

Answer:

\(1.29\times 10^{23}\text{ atoms}\)