PH = -log[H₃O⁺]
[H₃O⁺] = 10^-pH
<span>[H₃O⁺] = 10^-2,32
</span>[H₃O⁺] =0,0047863 ≈<u> 4,79×10×10⁻³ mol/dm³</u>
<em>B) -- 4</em><span><em>,79×10⁻³ M</em></span>
Explanation:
Just a few things to remember:
-
# of neutrons = Mass number - # protons
-
Mass number = # protons + # neutrons
-
Atomic Number = # of protons
- # of electrons = # of protons - charge on the atom
-
Symbol - use the atomic number to find the element in the periodic table
Resources are categorized as renewable or non-renewable. A renewable resource may replenish at the rate it is being used, while a non-renewable resource has a limited supply.
<u>Explanation:</u>
<u>Renewable Energy:</u>
- It is the energy that is obtained from natural resources like sun, wind, etc..
- It is the cleanest form of energy.
- 15% of the world's total energy depends upon renewable energy.
<u>Advantages of renewable energy:</u>
- Renewable energy is free to use and it is available in the abundant quantity.
- They produce low carbon emissions and it does not affect the environment.
<u>Dis-Advantages of renewable energy:</u>
- The initial step cost much like setting up the windmill and solar panels to obtain energy.
- Solar energy needs backup during the winter season.
<u>Non-Renewable Energy</u>
- A natural resource or source of energy existing finite quantity and not capable of being replenished.
- They are not environmentally friendly and it leads to environmental issues.
<u>Advantages of Non-Renewable Sources:</u>
- The Non-Renewable Sources is considered as cheap to use.
- They produce a tremendous amount of energy
<u>Disadvantages of Non-Renewable Sources:</u>
- Non-renewable sources release toxic gases in the air when burnt which are the major cause of global warming.
