How many moles are in 32.3g of calcium phosphate

 the formula mass of calcium phosphate [Ca3(PO4)2] is 310.177 amu, so its molar mass is 310.177 g/mol. This is the mass of calcium phosphate that contains 6.022 × 1023 formula units.

310.177

 As the [H3O+]  in  a solution decrease, the [OH-]  increase and Ph increase ( answer A)

explanation

[H3O +]      are  released  by an acid while [OH-]    are released  by base.

The Ph of  an  acid is below 7  while that of a base is above 7.

as [H3O+] is decreased in solution  [OH-]  is increased   which make the solution more basic hence the PH is  increrased.