Compared to the ideal angle, you would expect the actual angle between the bromine-oxygen bonds to be

Smaller

Explanation:

Though, your question is not too clear but base on my understanding, I have the following explanation;

The angle in the bromine-oxygen bonds will be smaller than the ideal angle, say for example, if the ideal angle is 120°, the actual angle of bromine-oxygen bonds will have lesser value because of the absence of lone pairs of electrons from the central atom in the ion. This will tend to squeeze the two single bond that exist before causing lesser angle.

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

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