When an aqueous solution of magnesium nitrate is mixed with an aqueous solution of potassium carbonate, ) kno3 will precipitateb) mgco3 will precipitatec) both mgco3 and kno3 will precipitated) no reaction occurs

The correct answer is Option B.

Explanation:

Double displacement reaction is defined as the chemical reaction in which exchange of ions takes place.

An insoluble salt in a solution is termed as a precipitate.

When an aqueous solution of magnesium nitrate reacts with an aqueous solution of potassium carbonate, it leads to the formation of an aqueous solution of potassium nitrate and a solid precipitate of magnesium carbonate.

The chemical equation for the above reaction follows:

Hence, the correct answer is Option B.

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