绝对偏差平均值x21()1niixxxSn100%xSRSDxn2nm(g)nM(/)g mol物质的质量物质的量（mol）=物质的摩尔质量nc(/)V()mol LL物质的量（mol）物质的量浓度溶液的体积挥发2327214627Cr OHeCrH O2HOHH OIIH nnH222IeI222223462222IeIIS OS OI+2价+1价232722614337CrOIHCrIH O222324622S OIS OI3233233223462322As OOHAsOH OH AsOIH OH AsOIH2222H SISHI 22242CuICuII+KSCN=CuSCN+KICuI242MnO85Mn4HeH O422234MnOH OeMnOOH224242225162108MnOCOHMnCOH O
