Question

solve all 3 quickly

s) Calculate the oxidation numbers for the atoms in the of the compounds below A) Nacio B) CASO c) HO J of heat are released in the combustion 5. (6 points) The value of AH" for the reaction below is-6535 J. of 22.0 g of C.H. (D(MW-78.0 g/mol)? 20, H. (1) 150, () - 1200,()+ 6H20 1) 6. (6 points) Using the activity series below write the redox reactions that occur involving sodium, copper and iron and their ions. Write only reactions that you expect to see.

Answer 1

Q.Y a Na₂Crou B) Caso c) H₂O2 Na = +1 Cast2 Hati Cr= +6 sat6 0 = -2 03)-1 0 = -2 AH=-6535 kJ for given reaction in which 2 molen of Coto or 2 x78 g = 156g of Bengene are burnt. For 156g Como released heat = 6535 kJ Sofor 22 a Che released heat - 6535x22= 921.60 kJ so for 22 g Coto released (V.5 156

0.6 In activity series arranged elemento are or for +2 I tendency of onidation decreases I tendency of reduction increases Pre cu Na and Fe 2 Nace) + Fe (ap) → 2 Nat cap + Fe (A) 1 u Reducing oridizing Agent agent Fe and Custo Feca) + Cut > Fe Cap + Cuca) for Reducing agent onidizing agent for Na and Cu + 2 2 No cantau (A) 2 Naco) + Cut cap, Reducing agent Omidizing agent