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The Mass of One Atom of an Element X is 2.0 × 10–23 G. Calculate the Atomic Mass of Element X. - Science

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Short Note

The mass of one atom of an element X is 2.0 × 10–23 g.

Calculate the atomic mass of element X.

What could element X be ?

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Solution

Given:

Mass of an atom of element X = 2.0 × 10-23g

We know that the mass of an atom of a substance is equal to the mass of 1 mole of that substance. 1 mole of a substance consists of 6.022 × 1023 atoms; therefore, the mass of an atom of a substance is equal to the mass of 6.022 × 1023 atoms.

Therefore, to calculate the atomic mass of element X, we need to calculate the mass of 6.022 × 1023 atoms of X.

Mass of 1 atom of X = 2.0 × 10-23
Mass of 6.022 × 1023 atoms of X = 6.022 × 1023 × 2.0 × 10-23 = 12 u

Hence, the atomic mass of element X is 12 u.

Carbon has an atomic mass of 12 u; therefore,  element X is carbon.

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 50 | Page 174
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