Answer:
0.026%
Explanation:
The Helium-4 is the isotope of the helium that has a mass equal to 4. The element has 2 electrons, so, the total radius of the electrons is 2*2.8 = 5.6 fm = 0.0056 pm.
So, the total radius of the particles is 0.0056 + 0.0026 = 0.0082 pm.
The percentage of the space that the particles occupy is the radius of them divided by the radius of the atom:
% = 0.0082/31 *100%
% = 0.026%
* 1 fentometer (fm) = 0.001 picometer (pm)
What happens if you apply pressure on the oobleck?
the surfice gets hard and nothing can pass through it, you can punch it and it will hurt
What happens if you try rolling the oobleck into a ball?
you cant i will go back to being a liquid and fall through your fingers
What happens when you let it run through your fingers?
its just like a liquid
only if you add presure will it turn hard
The correct answer is D . Coyote
Answer:
The mole is simply a very large number that is used by chemists as a unit of measurement.
Explanation:
The mole is thus the link between the micro world of atoms and molecules, and the macro world of grams and litres, the which we can easily measure by mass or volume. The masses for a mole of each element are given on the periodic table as the atomic weight. So, if have 12 g of
C
, I know, fairly precisely, how many atoms of carbon I have. Given this quantity, I know how many molecules of O
2 are required to react with the C
, which I could measure by mass or by volume.
