Answer:
One mole of a substance is equal to 6.022 × 10²³ units of that substance (atoms, molecules, or ions)
Explanation:
This number is Avogadro's number. The concept of the mole can be used to convert between mass and number of particles. its used to compare very large numbers.
<u>Answer:</u> The number of electrons for n = 0, 1 and 2 are 2, 6 and 10 respectively.
<u>Explanation:</u>
Huckel's rule is used to determine the aromaticity in a compound. The number of delocalized
electrons are calculated by using the equation:

where,
n = 0 or any whole number
- Calculating the value of electrons for n = 0
Putting values in above equation, we get:

- Calculating the value of electrons for n = 1
Putting values in above equation, we get:

- Calculating the value of electrons for n = 2
Putting values in above equation, we get:

Hence, the number of electrons for n = 0, 1 and 2 are 2, 6 and 10 respectively.
Answer:
Global Warming , Volcanic Eruption
Carbon-14 dating is a way of determining the age of certain archeological artifacts of a biological origin up to about 50,000 years old. It is used in dating things such as bone, cloth, wood and plant fibers that were created in the relatively recent past by human activities.