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C-752.4. Molecular mass of water =2×1+1×16=18g2111618g For 178.2g178.2g water nA=9.9nA9.9 Molecular mass of glucose =6×12+12×1+6×16=180g612121616180g For 18g18g glucose nB=0.1nB0.1 XB=0.10.1+9.9)XB0.10.19.9=0.010.01 XA=0.99XA0.99 For lowering of vapour pressure , p=p0AXA=P0A(1−XB)ppA0XAPA01XB P=760(1−0.01)P76010.01 =760−7.67607.6 =752.4torr

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