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