2C6H5OH+2Na=2C6H5ONa+H2
2 1
n(H2)=0,672/22,4=0,03; n(C6H5OH)=0,03*2=0,06; m(C6H5OH)=0,06*94=5,64;
W(C6H5OH)=5,64/20=0,282(28,2%).
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