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