Since density depends on the mass and volume of an object, we need both of these values combined in the correct way to solve for density. keep in mind that we may not be given the mass and volume directly, or the values may not be given in the units we want and we need to convert to the correct units before solving for density.
when converting between metric units, use the prefixes to you determine the magnitude of a value. the prefix k indicates kilo, 1000. therefore 1000 g = 1 kg.
a 11.0 kg iron weightlifting plate has a volume of 1400 cm3 . what is the density of the iron plate in g/cm3?
express your answer in grams per cubic centimeter to three significant figures.

Density=7.86g/cm³

Explanation:

To solve this exercise, we only need to convert units. To do so, we can use a three-step process:

In this case, the units we're given are kg and cm³, and the units we must convert them into are g and cm³. Keeping in mind the conversion factor of 1000 g = 1 kg, we convert the mass of the plate:

Then we divide the mass by the volume, that is already in cubic centimeters:

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

hey there!

mass = 6.75 g

volume =   9 cm³

therefore:

d = mass / volume

d   = 6.75 / 9

d = 0.7 g/cm³

answer b