The refractive index of pure cyclohexane is 1.4264 and that of pure toluene is 1.4967. During the distillation three fractions were collected. In each case the middle fraction was discarded. For the simple distillation the refractive index of the first fraction is 1.4475 and that of the final fraction is 1.4891. For the fractional distillation the refractive index of the first fraction is 1.4302 and that of the final fraction is 1.4938. Use this data to calculate the percent composition of the four fractions (two from each distillation).

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

just did the assignment and the answer was #1 +2 n

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

give me abc and i will get it for u.