Phosphorite is a mineral that is having 25% other non-phosphorus materials and 75% calcium phosphate. Calculate the mass of P4(s) can be formed from 1.0 Kg of phosphorite assuming an 80% yield of phosphorus from the calcium phosphate present.
2Ca3(PO4)2(s) + 6SiO2 + 10C(s)-----> 6CaSiO3 + P4(s) + 10CO(g)