Question

Wʜᴀᴛ Dᴏ Yᴏᴜ Mᴇᴀɴ Bʏ Mᴏʟᴇ.?

ɴᴏ Sᴘᴀᴍ❌❌ ​

Answer 1

Answer:

The mole is the unit of measurement for amount of substance in the International System of Units. A mole of a substance or a mole of particles is defined as exactly 6.02214076×10²³ particles, which may be atoms, molecules, ions, or electrons. In short, for particles, 1 mol = 6.023×10²³.

Step-by-step explanation:

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Answer 2

Answer:

Mole is a unit to measure the amount of any substance in chemistry.

Explanation:

1. We can measure the amount of any large quantity substances using units like dozen, gross.

2. While, if we have to measure the amount of any small quantity substances like number of atoms, molecules, ions, particles, we have to use mole.

3. We know that carbon ( C - 12 ) is a naturally occurring element.

4. It shares the electrons and is able to form millions of compounds.

5. All the living organisms contain carbon.

6. Due to this, carbon is considered as standard element.

7. If any substance contains as many as particles as there are atoms in 12 g of the carbon ( C - 12 ) element, then the amount of particles present in that substance is called as one mole.

8. When the number of atoms in 12 g of carbon ( C - 12 ) are calculated, it is found that it contains 6.0221367 × 10²³ atom/mol.

9. Hence, one mole of a substance means there exactly 6.0221367 × 10²³ particles are present.

10. These particles may be atoms, molecules, ions.

11. The number 6.0221367 × 10²³ was calculated by the scientist Amedo Avogadro and hence it is known as Avogadro's Constant ( Nᴀ ).

12. Mole is the SI unit of a fundamental quantity amount of substance. It is denoted as mol.

13. If we take 1 mole of water ( H₂O ), then it contains 6.0221367 × 10²³ molecules.

14. To calculate the number of moles, we can use the formula:

$\displaystyle\boxed{\red{\sf\:Number\:of\:moles\:=\:\dfrac{Mass\:of\:substance\:in\:grams}{Molar\:mass\:of\:substance\:in\:g\:mol^{-1}}}}$

15. Molar mass of a substance is nothing but the mass of one mole of substance which is measured in grams.

16. The numerical value of molar mass of any substance and atomic mass of the substance is equal.

Example:

1. Atomic mass of carbon is 12 u.

Molar mass of carbon is 12 g/mol.

2. Atomic mass of oxygen is 16 u.

Molar mass of oxygen is 16 g/mol.