Mr(H2SO3) = 1*2+32+16*3 = 82
Mr(Ca3(PO4)2) = 40*3+2*(31+16*4) = 310
Mr(Cu(OH)2) = 83,5+2*(16+1) = 117,5
Mr(H2SO3) = 1*2+32+16*3 = 82
Mr(Ca3(PO4)2) = 40*3+2*(31+16*4) = 310
Mr(Cu(OH)2) = 83,5+2*(16+1) = 117,5