Answer:
For carbon the most important forms of hybridization are the sp2- and sp3- hybridization. Besides these structures there are more possiblities to mix dif- ferent molecular orbitals to a hybrid orbital. An important one is the sp- hybridization, where one s- and one p-orbital are mixed together.
Answer:
A) ![6.5\times 10^{23}\ \text{molecules}](https://tex.z-dn.net/?f=6.5%5Ctimes%2010%5E%7B23%7D%5C%20%5Ctext%7Bmolecules%7D)
Explanation:
m = Mass of water = 38.9
M = Molar mass of water = 18 g/mol
= Avogadro's number = ![6.022\times 10^{23}\ \text{mol}^{-1}](https://tex.z-dn.net/?f=6.022%5Ctimes%2010%5E%7B23%7D%5C%20%5Ctext%7Bmol%7D%5E%7B-1%7D)
The reaction of electrolysis would be
![2H_2O(l)\rightarrow 2H_2(g)+O_2(g)](https://tex.z-dn.net/?f=2H_2O%28l%29%5Crightarrow%202H_2%28g%29%2BO_2%28g%29)
Number of moles of ![H_2O](https://tex.z-dn.net/?f=H_2O)
![n=\dfrac{m}{M}\\\Rightarrow n=\dfrac{38.9}{18}\ \text{mol}](https://tex.z-dn.net/?f=n%3D%5Cdfrac%7Bm%7D%7BM%7D%5C%5C%5CRightarrow%20n%3D%5Cdfrac%7B38.9%7D%7B18%7D%5C%20%5Ctext%7Bmol%7D)
From the reaction it can be seen that 2 moles of
gives 1 mole of ![O_2](https://tex.z-dn.net/?f=O_2)
So, number of moles of
produced is
![\dfrac{38.9}{18}\times \dfrac{1}{2}=1.081\ \text{mol}](https://tex.z-dn.net/?f=%5Cdfrac%7B38.9%7D%7B18%7D%5Ctimes%20%5Cdfrac%7B1%7D%7B2%7D%3D1.081%5C%20%5Ctext%7Bmol%7D)
Number of molecules
![1.081N_A=1.081\times 6.022\times 10^{23}\\ =6.5\times 10^{23}](https://tex.z-dn.net/?f=1.081N_A%3D1.081%5Ctimes%206.022%5Ctimes%2010%5E%7B23%7D%5C%5C%20%3D6.5%5Ctimes%2010%5E%7B23%7D)
So,
of oxygen is produced.
Answer:
Neodymium makes flints inside of lighters. It also takes away the green color off of glass. Rhenium is added with tungsten and molybdenum which makes filaments for lamps. Sulfur makes sulfuric acid which makes batteries and cleaners and can process ores.
Explanation:
An interesting fact for each element:
Neodymium is known for the atomic symbol Nd and the atomic number 60.
Rhenium is known for the atomic symbol Re and the atomic number 75.
Sulfur is known for the atomic symbol S and the atomic number 16.
I hope the Answer answers your question. I gave you some facts to remember those elements in the periodic table!
Answer:
molecular so number 3. ...