Mr (cu o) mr (p2o5) mr (co2) mr (bao) mr (ca)(oh)2 mr(naoh) mr (ba)(oh)2 mr (nacl) mr (na2so4) mr (caco3)

Mr(P2O5)=30·2+16·5=380
Mr(CO2)=12+16·2=44
Mr(BaO)=137+16=153
Mr((Ca)(OH))2=(40·2)+(16+1·2)=114
Mr(NaOH)=22+16+1=39
Mr((Ba)(OH)2=(137·2)+(16+1·2)=308
Mr(NaCl)=22+35=57
Mr(Na2SO4)=22·2+32+16·4=140
Mr(CaCo3)=40+59·3=217
З
:З:З:З:З:З:З