I_1, I_2, I_3, of an element are 176, 346 and 1850K.cals respectively. The molecular formula of its phosphate is

I_1, I_2, I_3, of an element are 176, 346 and 1850K.cals respectively.

1.	I_1, I_2, I_3, of an element are 176, 346 and 1850K.cals respectively. The molecular formula of its phosphate is
Answer» `M_3PO_4` `MPO_4` `M_2(PO_4)_3` `M_3(PO_4)_2` ANSWER :D