2s 2p
3s 3p 3d
4s 4p 4d 4f
5s 5p 5d 5f
6s 6p 6d
7s 7p
hope it helps
Answer:
The order is
Quartz > Calcium > Ammonia > Chlorine
Explanation:
Among given compounds
Quartz is a covalent compound with extensive bondings and thus it will have highest melting point
Calcium is a metal so it will have strong metallic bonds thus will have high melting point, however less than quartz.
ammonia is a polar molecule with weak hydrogen bond as intermolecular interactions thus will have higher melting point than chlorine
chlorine is a non polar molecule with weak intermolecular london dispersion forces.
Answer:
Explanation:
1. Write the equation for the half-reaction.
Mg²⁺ + 2e⁻ ⟶ Mg
The number of electrons transferred (z) is 2 mol per mole of Mg.
2. Calculate the number of coulombs
Q = It
3. Mass of Mg
We can summarize Faraday's laws as
Answer:
The electrons in the outermost shell are used to determine the dot structure.
Explanation:
According to Lewis, the structure of a molecule could be determined by accurately determining the number of electrons on the outermost shell of the Central atom. Silicon has four valence electrons on its outermost shell and it is the central atom in silicon dioxide. Silicon dioxide is a linear molecule as it forms two double bonds with oxygen.
Answer:
375.3KJ
Explanation:
The following data were obtained from the question:
Mass of water = 166g
Heat of Vaporisation (ΔHv) = 40.7kJ/mol
Heat (Q) =..?
Next, we shall determine the number of mole in 166g of water. This is illustrated below:
Mass of H2O = 166g
Molar mass of H2O = (2x1) + 16 = 18g/mol
Number of mole = Mass/Molar Mass
Number of mole of H2O = 166/18
Number of mole of H2O = 9.22 moles.
Now, we can obtain the heat required to vaporise the water as shown below:
Q = n·ΔHv
Q = 9.22 mol x 40.7kJ/mol
Q = 375.3KJ
Therefore, the heat required to vaporise the water is 375.3KJ.
