Question

8.) find the molar mass of ca₃(po₄)₂. (3 points)

Explanation:

Step1: Identify atomic masses

The atomic mass of Ca is approximately 40.08 g/mol, P is approximately 30.97 g/mol, and O is approximately 16.00 g/mol.

Step2: Calculate mass of Ca atoms

There are 3 Ca atoms in \(Ca_3(PO_4)_2\). So the total mass contributed by Ca is \(3\times40.08 = 120.24\) g/mol.

Step3: Calculate mass of P atoms

There are 2 P atoms in \(Ca_3(PO_4)_2\). So the total mass contributed by P is \(2\times30.97=61.94\) g/mol.

Step4: Calculate mass of O atoms

There are \(4\times2 = 8\) O atoms in \(Ca_3(PO_4)_2\). So the total mass contributed by O is \(8\times16.00 = 128\) g/mol.

Step5: Calculate molar mass

Add up the masses of Ca, P and O. \(120.24+61.94 + 128=310.18\) g/mol.

Answer:

310.18 g/mol