1. nS=24/32=0,75(m0l)
S+O2-to->SO2
nO2=nS=0,75(mol)
=>vO2=0,75x22,4=18,8(lít)
b. nSO2=nS=0,75(mol)
=>mSO2=0,75x64=48(gam)
2.
a. nO2=4,48/22,4=0,2(mol)
2Cu+O2-to->2CuO
nCu=2nO2=0,2x2=0,4(mol)
=>mCu=0,4x64=25,6(gam)
b. nCuO=nCu=0,4(mol)
=>CuO=0,4x80=32(gam)
3.
a. nFe=33,6/56=0,6(mol)
3Fe+2O2-to->Fe3O4
nO2=2/3nFe=2/3x0,6=0,4(mol)
=>vO2=0,4x22,4=8,96(lít)
b. nFe3O4=1/3nFe=1/3x0,6=0,2(mol)
=>mFe3O4=0,2x232=46,4(gam)