Question

what is the mass of one molecule of oxygen?
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Answer 1

Answer:-

5.31×10⁻²³ g

Explanation:-

• Molar mass of Oxygen (O) = 16g/mol

Hence, molar mass of oxygen molecule [O₂] is :-

= 16×2

= 32g/mol

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Firstly, let's calculate the number of mole in 1 molecule of Oxygen .

• Avogadro number = 6.022×10²³

Number of mole :-

= No of molecules/Avogadro Number

= 1/6.022×10²³ mole

[We are not converting the number of moles into decimal, for simplification in calculations in the next step]

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Now, we know that :-

=> Mass = No of moles × Molar mass

=> Mass = 1/6.022×10²³ × 32

=> Mass = 32/6.022×10²³

=> Mass = 5.31/10²³

=> Mass = 5.31×10⁻²³ g

Thus, mass of one molecule of oxygen is 5.31×10⁻²³g .

Answer 2

Answer:

32 amu

O2 is a diatomic molecule. The mass of an oxygen atom = 16 amu. ∴ Mass of O2 molecule = 2 × 16 = 32 amu.

Explanation:

hope it helps