2Na+2H2O=2NaOH+H2
MH2O=2*1=16=18
MNaOH=23+16+1=40
MH2=2*1=2
100g..................41g Napur
230 g..................x=94,3 g
2*23/94,3=2*18/y y=73,8 g H2O
2*23/94,3=2*40/z z= 164 g NaOH
2*23/94,3=1/t t=2,05 mol H2
1mol ..........22,4 l
2,05 ..........w=45,92 l H2