DDT is an insecticide banned by the U. S. government because of its hazard to fish and birds. It can be prepared as follows: 2 C6H5Cl + C2HOCl3 C14H9Cl5 + H2O
chlorobenzene chloral DDT
If 451 g of chlorobenzene reacts with 368 g of chloral to yield 507 g of DDT, determine which species is the limiting reactant, and calculate the theoretical yield and the percentage yield.

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

put the answers   and i could answer.

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

im pretty sure its b