Posted by **ALISON** on Tuesday, August 30, 2011 at 3:35pm.

The mass of the earth is known to be about 5.98 X10^24kg assume that it is approx. spherical with an average diameter of 1.276X10^7 METERS. from these data calculate the average density of the earth(g/cm^3) could the earth be made mostly of water (density=1.00g/cm^3), abundant elements like calcium silicate (density=3.27g/cm^3) or aluminum oxide(density=4.0g/cm^3)?

How do I explain this????What hypothesis would explain why the earth has a considerably higher density than any of these materials, which are abundant at the surface of the earth???

i got 2.88g/cm^3 for the earths density. is that right?

- Chemistry -
**DrBob222**, Tuesday, August 30, 2011 at 5:39pm
I did not get 2.88 g/cc as a density but I could have made an error.

I used 4/3(*pi*r^3) for volume and converted diameter in m to cm first.

I converted mass in kg to grams first.

For the explanation, what is the core of the earth. If that is made of something much more dense it would make the overall density more than the surface area. Post your work if you want me to check the density calculation.

- Chemistry -
**DrBob222**, Tuesday, August 30, 2011 at 5:42pm
http://www.universetoday.com/26771/density-of-the-earth/

- Chemistry -
**DrBob222**, Tuesday, August 30, 2011 at 5:44pm
See this link for the inner core.

http://en.wikipedia.org/wiki/Earth

## Answer This Question

## Related Questions

- Maths - The earth is approximately a sphere of average diameter 12740km. The ...
- earth - The radius of the Earth is approximately 6370 km. If one could dig down ...
- Chemistry - Neutron stars are composed of solid nuclear matter, primarily ...
- Physics - The Earth has a mass of 5.97 x10^24 kg and the Moon has a mass of 7.36...
- Chemistry help - The earth moves round the sun in one year.the average earth-sun...
- physics - Calculate the force of gravity between Earth (mass = 6.0 * 1024 kg ) ...
- Physics-mechanics - A 1.0 kg mass weighs 9.8 N on Earth's surface, and the ...
- Physics ( Thickness of a Spherical Shell) - Aluminum floater: A spherical shell ...
- Physics Using hydrostatic equilbrium) - 3. A model of Earthâ€™s interior: Look up ...
- physics-mechanics - A 1.0 kg mass weighs 9.8 N on Earth's surface, and the ...

More Related Questions