InterviewSolution
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InterviewSolution
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The mass of a single atom of an element X is `2.65 xx 10^(-23) g`. What is its atomic mass ? What could this element be ? |
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Answer» The atomic mass of element is numerically euqal to the mass of 1 mole of its atoms. Since 1 mole of atoms is `6.022 xx 10^(23)` atoms, so it means that the atomic mass of an element is numerically equal to the mass of its `6.022 xx 10^(23)` atoms. Now, `1` atom of element X has mass `= 2.65 xx 10^(-23) g` So, `6.022 xx 10^(23)` atoms of element X have mass `= 2.65 xx 10^(-23) xx 6.022 xx 10^(23)` `= 15.96 g` `= 16 g` Thus, the atomic mass of the element X is 16 u. The element of atomic mass 16 u is oxygen, having the symbol O. |
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