Chemistry math

[meglynn247]

What is the mass of gold in a bar that measures 2.0 cm by 4.0 cm by 20.0 cm? (The density of gold is 19.3 g/cm3 at 20°C.)




I don't need the answer, i can figure that out for myself... I just need help getting started and setting up equations/ conversions! thanks!

 

[lookagain]

What is the mass of gold in a bar that measures 2.0 cm by 4.0 cm by 20.0 cm? (The density of gold is 19.3 g/cm3 at 20°C.)


I don't need the answer, i can figure that out for myself... I just need help getting started and setting up equations/ conversions! thanks!

Ignore the 20 degrees Celsius.

It's given that there are 19.3 grams of mass contained for every one cubic centimeter of gold.

Figure out the volume of the rectangular gold bar by using V = length*width*height


Set up a proportion:

(mass of the gold bar in grams)/(volume of the gold bar in cubic cm) = (19.3 g)/(1 cubic cm)