Phosporus can be prepared from calcium phosphate by the following reaction: 2ca3(po4)2+6sio2+10c → 6casio3+p4+10co phosphorite is a mineral that contains ca3(po4)2 by mass? assume an excess of the other reactants plus other non-phosphorus-containing compounds. what is the maximum amount of p4 that can be produced from 1.9kg of phosphorite sample is 75% ca3(po4)2 by mass? assume an excess of the other reactants