Pure, 24-k gold is very malleable. by mixing gold whit other metals it become harder and less maleable. in what situation would you want to use gold that is not as maleable.
really i need whit this

It could be used in electronics, optics and medicine.

Explanation:

Although gold is easily malleable, it can be combined with other metals to achieve stable alloys, for example, with copper or silver and the objects will be protected against corrosion. Gold is resistant to air and water and is an excellent conductor of electricity and heat. It is currently in the form of jewelry. Even in the furniture they get to brown and leaving a wonderful shine. In electronics, optics and medicine, gold is used in different ways.

the volume increases

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