6. In the balanced redox equation: 8H+ + 6Cl- + Sn + 4NO3 -1 --> SnCl6 -2 + 4NO2 + 4H2O the reducing agent is
a) H +
b) Cl
c) Sn
d) NO3 -1
e) SnCl6 -2

The oxidizing agent in the given reaction will be NO3 -1 ion.

Reactant side:

Oxidation state of hydrogen = +1

Oxidation state of oxygen = -2

Oxidation state of Tin = 0

Oxidation state of chlorine = -1

Oxidation state of nitrogen = +5

Product side:

Oxidation state of hydrogen = +1

Oxidation state of oxygen = -2

Oxidation state of Tin = +6

Oxidation state of chlorine = -1

Oxidation state of nitrogen = +4

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml

i do not get it   at all