Answer:
The formula for the anhydrous compound that was part of the mixture called natron that was used by the Egyptians is Na2(CO3)10(H2O).
They use this compound for medicine, cookery, agriculture, in glass-making and to dehydrate egyptian mummies.
Compound of sodium carbonate and sodium bicarbonate was the name of the resulting hydrate that formed.
Answer:
I think <em><u>alpha</u></em> and <em><u>beta</u></em> is the answer.
The answer to this question will be C
Explanation
Radius of neon atom : 69 pm = ![69\times 10^{-12} m](https://tex.z-dn.net/?f=69%5Ctimes%2010%5E%7B-12%7D%20m)
Volume occupied by the one atom:![\frac{4}{3}\pi r^3](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7B3%7D%5Cpi%20r%5E3)
![=\frac{4}{3}\times 3.14\times(69\times 10^{-12} m)^3=1.37\times 10^{-30} m^3](https://tex.z-dn.net/?f=%3D%5Cfrac%7B4%7D%7B3%7D%5Ctimes%203.14%5Ctimes%2869%5Ctimes%2010%5E%7B-12%7D%20m%29%5E3%3D1.37%5Ctimes%2010%5E%7B-30%7D%20m%5E3)
given that
atoms are present in 1L
1 L = 0.001 ![m^3](https://tex.z-dn.net/?f=m%5E3)
The volume occupied by the
neon atoms
![2.69\times 10^{22}\times 1.37\times 10^{-30} m^3=3.68\times 10^{-8} m^3](https://tex.z-dn.net/?f=2.69%5Ctimes%2010%5E%7B22%7D%5Ctimes%201.37%5Ctimes%2010%5E%7B-30%7D%20m%5E3%3D3.68%5Ctimes%2010%5E%7B-8%7D%20m%5E3)
Fraction of volume occupied by the neon atom:
![=\frac{3.68\times 10^{-8} m^3}{0.001 m^3}=3.68\times 10^{-11} m^3](https://tex.z-dn.net/?f=%3D%5Cfrac%7B3.68%5Ctimes%2010%5E%7B-8%7D%20m%5E3%7D%7B0.001%20m%5E3%7D%3D3.68%5Ctimes%2010%5E%7B-11%7D%20m%5E3)
![3.68\times 10^{-11} m^3](https://tex.z-dn.net/?f=3.68%5Ctimes%2010%5E%7B-11%7D%20m%5E3%3C0.001%20m%5E3%20%3D%201L)
The fraction of of volume occupied by the neon atom is very less than the 1 L which indicates the presence of large amount of empty space between the atoms of the gas.