Which of the following pairs of substances would best be separated using a centrifuge, and why?
cream and milk, because of their difference in density
cream and milk, because of their difference in boiling point
salt and water because of their difference in magnetism
salt and water, because of their difference in solubility

Centrifugation is a separation method that is based on the difference in density between the objects. Cream and milk can be separated by Centrifugation  because of their difference in density.

Centrifugation depends on the density of substances. It is commonly used to separates mixtures in the medical field such as the components of blood.

In this case, Centrifugation is used to separate Cream and milk, because of their difference in density.

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the answer is a and have a great day

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