Explanation:
Formula for work done is as follows.
W = 
where, k = proportionality constant = 
d = separation distance = 0.45 nm = 
Now, we will put the given values into the above formula and calculate work done as follows.
W =
= ![\frac{-[8.99 \times 10^{9} Jm/C^{2} \times 3.2 \times 10^{-19} C \times -3.2 \times 10^{-19} C]}{0.25 \times 10^{-9} m}](https://tex.z-dn.net/?f=%5Cfrac%7B-%5B8.99%20%5Ctimes%2010%5E%7B9%7D%20Jm%2FC%5E%7B2%7D%20%5Ctimes%203.2%20%5Ctimes%2010%5E%7B-19%7D%20C%20%5Ctimes%20-3.2%20%5Ctimes%2010%5E%7B-19%7D%20C%5D%7D%7B0.25%20%5Ctimes%2010%5E%7B-9%7D%20m%7D)
= 
Thus, we can conclude that work required to increase the separation of the two ions to an infinite distance is 
.
Answer :
Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule. The electrons are represented by dot.
The given molecule is, perbromate ion.
Bromine has '7' valence electrons and oxygen has '6' valence electron.
Therefore, the total number of valence electrons in perbromate ion, 
= 7 + 4(6) + 1 = 32
According to Lewis-dot structure, there are 14 number of bonding electrons and 18 number of non-bonding electrons.
Formula for formal charge :
The Lewis-dot structure of perbromate ion is shown below.
Answer:
Exothermic reaction: In exothermic reaction, energy is transferred to the surroundings, and the surrounding temperature increases, this is known as exothermic reaction. In other words energy exits in exothermic reaction. Some example of exothermic reactions are:
1) Neutralisation reaction.
2) Combustion reaction.
3) Some oxidation reaction.
Endothermic reaction: In endothermic reaction, energy is taken in from the surrounding, and the surrounding temperature decreases, this is known as endothermic reaction. In other words energy enters in endothermic reaction. Some example of exothermic reactions are:
1) Thermal decomposition.
2) Reaction between citric acid and sodium hydrogen carbonate.
We know that the molar mass of N is 14 and O is 16,
therefore the molar mass of N2O is:
molar mass N2O = 14 * 2 + 16 = 44 g/mol
The number of moles:
moles N2O = 0.187 / 44
moles N2O = 0.00425 mol
There are 2 moles of N per 1 mole of N2O hence:
moles N = 0.00425mol * 2
<span>moles N = 0.0085 mol</span>
Since CO2 (Carbon Dioxide) is a gas these properties would be: -no definite shape and volume. A gas is invisible and colorless to the human naked eye. An example of pure gas would be like air. Just like air, you see no definite shape and weight or volume.
