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If One Gram of Sulphur Contains X Atoms, Calculate the Number of Atoms in One Gram of Oxygen Element. - Science

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Short Note

If one gram of sulphur contains x atoms, calculate the number of atoms in one gram of oxygen element.

(Atomic masses : S = 32 u ; O = 16 u)

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Solution

Given:

1g  sulphur contains x atoms
We know that equal moles of all substances contain equal number of molecules (1 mole of all substances contains 6.022 × 1023 molecules).

Therefore, the ratio of molecules in sulphur and oxygen will be the same as their ratio of moles.
Therefore, 1g of S = 1/32 moles of S
Now, 1/32 moles of S contain x molecules (given). Since equal number of molecules are present in equal moles of all substances, 1/32 moles of oxygen will also contain x number of molecules.

Number of moles in 1g of oxygen:

1 mole of O = 16g

16g  O = 1 mole of O

Therefore, 1g  O2 = 1/16 moles of O2

We have already stated that 1/32 moles of oxygen contain x molecules; therefore,1/16 mole of oxygen will contain = x × 32 / 16 = 2x molecules Hence, 1 gram  oxygen consists of 2x the number of sulphur molecules.

Concept: Atoms and Molecules Numericals
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APPEARS IN

Lakhmir Singh Class 9 Chemistry - Science Part 2
Chapter 3 Atoms and Molecules
Hots Questions | Q 48 | Page 174
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