Question

25. - 24 The mass of one molecule of O2 in grams is [Given: average atomic mass of 0= 16 u and 1 u= 1.66 x 10^-*g] (A) 32.0 x 10-48 (B) 26.6 x 10-24 g (C) 16.0 x 10-18 (D) 53.1 x 10 g Х g - -24 OD OD -24 प्लीज गिव मी आंसर ऑफ दिस क्वेश्चन प्रॉपर्ली ​

Answer 1

Answer:

Explanation:.d

53.1×10  

−23

g

The molecular weight of oxygen is 32 g/mol.  

Hence, one mole of oxygen weighs 32 g.  

One mole of oxygen contains 6.023×10  

23

 molecules.

 

The mass of one molecule of oxygen is:

6.023×10  

23

 

32

​

=5.31×10  

−23

 g.

Answer 2

Explanation:

O2 is a diatomic molecule.

The mass of an oxygen atom = 16 amu.

∴ Mass of O2 molecule = 2 × 16 = 32 amu.

Mass of one molecule of oxygen

⇒ 32/ Avogadro constant

${6.023} \times {10}^{ - 23}$

⇒

$5.31 \times {10}^{ - 23} g.$

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