Question

Calculate the number of moles in 200 gram of oxygen molecules

Answer 1

Answer:

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Answer 2

Answer:

The no. of moles in 200g of O₂ is 6.25 mol.

Explanation:

• In the study of chemistry, a mole is the amount of a substance that contains precisely 6.02214076 × 10²³ of the substance's "elementary entities."
• The symbol "Nₐ" is frequently used to indicate the value 6.02214076 × 10²³, also known as the Avogadro constant.
• Atoms, molecules, monoatomic and polyatomic ions, as well as other particles, are examples of the elementary entities that can be represented in moles (such as electrons).
• The number of chemical elements is indicated by a mole fraction. The value of 6.023 × 10²³  (Avagadro number) is equal to one mole of any substance . The mole fraction unit is mol.
• The number of moles formula is denoted by the following expression:

                  $Number of moles= \frac{Mass of substance}{Mass of one mole}$

As per the question:

Molecular weight of O₂ ⇒ 6 × 16 =32g

Therefore 32g ⇒ 1 mol

Now, no. of moles in 200g of  O₂

$Number of moles= \frac{Mass of substance}{Mass of one mole}$

$Number of moles= \frac{200}{32}$

$Number of moles= 6.25 mol$

∴ The no. of moles in 200g of O₂ is 6.25 mol.

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