Question

what quantity in moles of csi are in 64.1 grams of csi?

Explanation:

Step1: Find molar mass of CsI

Molar mass of Cs: \(132.91\space g/mol\), I: \(126.90\space g/mol\).
Molar mass of \(CsI = 132.91 + 126.90 = 259.81\space g/mol\).

Step2: Use moles formula (\(n=\frac{m}{M}\))

Given \(m = 64.1\space g\), \(M = 259.81\space g/mol\).
\(n=\frac{64.1}{259.81}\approx0.247\).

Answer:

\(0.247\)