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48g of Mg contains the same number of atoms as 160g of another element. The atomic mass of the element is

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answer is C.

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Detailed Solution

24g = N_A atoms of Mg

48g = 'X' atoms of Mg

X = 2N_A

$\large \because$ 160g of an elements contains the same number of atoms of Mg

Two gram atoms of element = 160g

One gram atoms of element = 80g

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