Question

determine the molar mass of $\ce{cr3(po4)2}$. provide an answer to two decimal places.

Explanation:

Step1: Find molar mass of each element

Molar mass of \(Cr = 51.9961\space g/mol\), \(P=30.973762\space g/mol\), \(O = 15.999\space g/mol\)

Step2: Calculate molar mass of \(Cr_3(PO_4)_2\)

There are 3 \(Cr\) atoms, 2 \(P\) atoms and \(2\times4 = 8\) \(O\) atoms.
Molar mass \(M=3\times51.9961+2\times30.973762 + 8\times15.999\)

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Answer:

\(345.93\space g/mol\)