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If 1g of Oxygen element contains …

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If 1g of Oxygen element contains X atoms, what will be the Number of atoms in 1g of aluminium? (Atomic mass: O= 16, Al=27).

Posted by Archit Dubey 3 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Gaurav Seth 3 years, 11 months ago

No. of Particles = given mass/Gram Atomic/Molecular Mass x Avogadro's Number

Gram atomic mass of oxygen = 16u (given)

Given mass = 1g

No. of atoms = 1/16 x 6.022 x 10²²

= 0.376375 x 10²² = 3.763 x 10²¹ atoms

So, X = 3.763 x 10²¹

Similarly, for aluminum,

No of atoms = 1/27 x 6.022 x 10²²

≈ 2.230 x 10²¹ atoms

1Thank You

ANSWER

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