Ta co Mna2co3.h2o = ( 23.2+12+3.16).(3.2+16)=3388
ta co %mNa2co3 = M.100/338= 106.100/3388= 3,13%
->mNa2co3= 3,13.33/100 = 106 g
-> khoi luong cua na2c03 trong 2kg hh la 106/1000.2=0.212 kg
phan sau ban chi can lam tuong tu nhu bai cua minh la duoc