I'm taking chemistry this semester for the first time(i used to be a liberal arts person...used to be) but now I've moved onto science. Everything was going smoothly here in chapter one until I came across this problem: PRACTICE EXERCISE 2 - the one about the average depth of the oceans. The question suggests that I use data from the previous Practice Exercise, which is one of the two underlined answers in red. I've been wrecking my brain on how to start. The answer is 1.2 x 10^4 ft.
I've tried converting the 1.36... underlined portion to feet, but I don't know what to do about the 10^9km^3 and how to rid myself of of that exponent on the km. I've tried converting the 10^9km to feet and then working out the cube to get rid of the exponent 3. I tend to come out with an extremely length serious of numbers when I tried to convert everything to feet. Can anyone help?
Thanks!
Your volume in liters for the ocean is correct. Now you can use the figures provided to find the area of the oceans in $\text{km}^2$ If you divide the volume in $\text{km}^3$ by the area in $\text{km}^2$ you get an average depth in $\text{km}$. Now convert that to feet.