Question

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)

Answer 1

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
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