Balancing Chemical Equations-Need Help ASAP!

[TheMan]

Please rewrite and balance the equations (They should look like how they are now but balanced) ASAP!
(Note: I tryed them in the Balancer on this website and it stated "Error: Impossible Reation") - Please Help!! Thanks!!!

NaCI + F₂ = NaF + CI₂
AgNO₃ + MgCI₂ = AgCI + Mg(NO₃)₂
AIBr₃ + K₂SO₄ = KBr + AI₂(SO₄)₃
C₈H₁₈ + O₂ = 1O₂ + H₂O
FeCI₃ + NaOH = Fe(OH)₃ + NaCI
HCI + CaCO₃ = CaCI₂ + H₂O + CO₂

[Riley]

2NaCl + F₂ --> 2NaF +Cl₂
2AgNO₃ + MgCl₂ --> 2AgCl + Mg(NO₃)₂
2AlBr₃ + 3K₂SO₄ --> 6KBr + Al₂(SO₄)₃

there are the first three

[expert]

NaCI + F₂ = NaF + CI₂ - this one is easy
AgNO₃ + MgCI₂ = AgCI + Mg(NO₃)₂ - this one is easy
AIBr₃ + K₂SO₄ = KBr + AI₂(SO₄)₃ -this reaction will not happen
C₈H₁₈ + O₂ = 1O₂ + H₂O - this reaction has incorrect product (O₂)
FeCI₃ + NaOH = Fe(OH)₃ + NaCI - this one is easy
HCI + CaCO₃ = CaCI₂ + H₂O + CO₂ - this one is easy