Question

calculate the number of moles of solute in 25.29 ml of 0.1355 m k₂cr₂o₇(aq).
moles of solute: mol

Explanation:

Step1: Convert volume to liters

The formula for molarity \(M=\frac{n}{V}\) (where \(n\) is the number of moles and \(V\) is the volume in liters). Given \(V = 25.29\space mL\). Convert \(mL\) to \(L\): \(V=\frac{25.29}{1000}=0.02529\space L\)

Step2: Rearrange the molarity formula to solve for \(n\)

From \(M=\frac{n}{V}\), we can get \(n = M\times V\). Given \(M = 0.1355\space M\) and \(V=0.02529\space L\). Then \(n=0.1355\times0.02529\)

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Answer:

\(0.003426\)