A metal worker wants to figure out the cost of making a rectangular iron bar. He knows that the required dimensions of the bar are 8. 0 cm (width), 0. 40 cm (height), and 310 cm (length). If this kind of iron costs $0. 015 per cm3, what is the cost of making the bar (to the nearest dollar)? $5 $15 $37 $93.

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

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

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock