The answer to this question is simple
Avogadros no of atoms (6.023×1023) atoms or molecule are present in one mole of that substance always
So here we have 1 mole of Manganese atom
And weight of 1 mole of any atom. Or molecule is it's molar mass
And molar mass of manganese is 54.93 gram
So the answer is
54.93 gram
I hope this helps. If you have any query or want more detailed explanation, feel free to ask in the comments section below.
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