* CO9
-Tính nCO9:
nCO9= \(\dfrac{m}{M}\)= \(\dfrac{8.8}{156}\)≃ 0.0564(mol)
-Tính mC, mo:
nC= nCO9= 0.0564(mol)→mC= n*M= 0.0564*12= 0.6768(g)
no= 9nCO9= 9*0.0564=0.5076(mol)→ mO= 0.5076*16=8.1216(g)
*Fe2O3
-Tính nFe2O3
nFe2O3= \(\dfrac{40}{160}\)= 0.25(mol)
-Tính mFe,mO:
nFe= 2nfe2O3= 2*0.25=0.5(mol)→ mFe= 0.5*56=28(g)
nO= 3nFe2O3=3*0.25=0.75(mol)→ mO= 0.75*16= 12(g)
*H2O
-Tính nH2O:
nH2O= \(\dfrac{9}{18}\)=0.5(mol)
-Tính mH, mO:
nH= 2nH2O= 2*0.5=1→ mH = 1*1=1(g)
mO= mH2O-mH= 9-1=8(g)
*Fe2(SO4)3
-Tính nFe2(SO4)3
nFe(SO4)3=\(\dfrac{200}{400}\)=0.5(mol)
-Tính mFe,mS, mO:
nFe= 2nFe(SO4)3= 2*0.5=1(mol)→mFe= 1*56=56(g)
nS=nSO4=3nFe2(So4)3=3*0.5=1.5(mol)→mS= 1.5*32=48(g)
mO= mFe(SO4)3- mS-mFe=200-56-48=96(g)
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