Question

covert 145 grams of platinum (pt) into atoms

Explanation:

Step1: Find molar mass of Pt

The molar mass of platinum (\(Pt\)) is \(195.08\space g/mol\).

Step2: Calculate moles of Pt

Use the formula \(n=\frac{m}{M}\), where \(m = 14.5\space g\) and \(M=195.08\space g/mol\).
\(n=\frac{14.5}{195.08}\approx0.0743\space mol\)

Step3: Calculate number of atoms

Use Avogadro's number \(N_A = 6.022\times 10^{23}\space atoms/mol\).
\(N=n\times N_A=0.0743\times6.022\times 10^{23}\)
\(N = 4.47\times 10^{22}\space atoms\)

Answer:

\(4.47\times 10^{22}\space atoms\)