THIS NEEDS TO BE FILLED OUT

1.) Coefficient; 3

Subscript to Mg; None (1)

Subscript to Cl; 2

2.) Coefficient; none (1)

Subscript to V; 2

Subscript to O; 5

3.) Coefficient; 4

Subscript to K; 2

Subscript to C; None (1)

Subscript to O; 3

3.) Coefficient; None (1)

Subscript to Na; None (1)

Subscript to C; 2

Subscript to H; 3

Subscript to O; 2

Explanation:

The coefficient is the first big number and the subscript is the smaller number after the element.

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

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.