Answer:
4.27 moles of NaCl
Explanation:
Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol
Number of moles of NaCl(table salt) = 250 grams /58.5 g/mol
= 4.27 moles of NaCl
reactants, particles and atoms
Answer:
There are 12 sigma bonds and 3 pi bonds in benzene
Explanation:
- Molecular formula of benzene is .
- Here six carbon atoms are joined together through alternative single and double bond forming a six membered cyclic ring.
- Six hydrogen atoms are attached to six carbon atoms through a single bond.
- A single bond represents a sigma bond. A double bond consists of a sigma bond and a pi bond.
- In the Lewis structure of benzene, there are three C-C single bonds, three C=C double bonds and six C-H single bond.
- Hence there are 12 sigma bonds and 3 pi bonds in benzene
- Lewis structure of benzene is given below
If element X has 85 protons, then it has 85 electrons.
No matter what element it is, there will ALWAYS be the same amount of protons as there are electrons.
By the way, thanks for asking this question. I just learned this yesterday, so it gave me a way to show what I learned.
Co: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷
Co(2+): 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁷
or....
Co: K² L⁸ M¹⁵ N²
Co(2+): K² L⁸ M¹⁵