Answer: The correct answer is option a.
Explanation: Binary ionic compounds are the compounds made up of two ions, one is cation which is metal and another is anion which is a non-metal.
Rules for the naming of Binary Ionic compound.
1. First write the full name of cation.
2. The anion is named after using the suffix '-ide'. For example: If the anion is bromine, the name will be bromide and so on.
3. If the metal atom is Transition element, then the roman numeral is included after the metal name to indicate the oxidation number of the metal.
So, in order to write the name of Binary Ionic Compound, we first write metal followed by non-metal. Hence, the correct option is option a.
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Answer : The photon energy of this light in units of nanometers, (nm) is, 
Solution :
Formula used :

where,
E = energy of photon = 
h = Planck's constant = 
c = speed of light = 
= wavelength = ?
Now put all the given values in the above formula, we get:


conversion used : 
Therefore, the photon energy of this light in units of nanometers, (nm) is, 
Answer:
The hydrogen ion concentrations associated with these pH value 7.35 is 
The hydrogen ion concentrations associated with these pH value 7.45 is
.
Explanation:
To calculate the pH of the solution, we use the equation:
![pH=-\log[H^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%5BH%5E%2B%5D)
We are given:
1) pH = 7.35
Putting values in above equation, we get:
![7.35=-\log[H^+]](https://tex.z-dn.net/?f=7.35%3D-%5Clog%5BH%5E%2B%5D)
![[H^+]=4.467\times 10^{-8} M\approx 4.5\times 10^{-8} M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D4.467%5Ctimes%2010%5E%7B-8%7D%20M%5Capprox%204.5%5Ctimes%2010%5E%7B-8%7D%20M)
The hydrogen ion concentrations associated with these pH value 7.35 is 
2) pH = 7.45
Putting values in above equation, we get:
![7.45=-\log[H^+]](https://tex.z-dn.net/?f=7.45%3D-%5Clog%5BH%5E%2B%5D)
![[H^+]=3.548\times 10^{-8}M \approx 3.6\times 10^{-8} M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D3.548%5Ctimes%2010%5E%7B-8%7DM%20%5Capprox%203.6%5Ctimes%2010%5E%7B-8%7D%20M)
The hydrogen ion concentrations associated with these pH value 7.45 is
.