Question

find the no of gram atoms and mass of an element having 2*10^ 23 atoms.atomic mass of element is 32

Answer 1

Answer:

No. of Moles / Gram atoms = 0.3

Mass = 9.6

{the given element is Sulphur}

Explanation:

{no. of gram atoms could be related as moles and hence, could be calculated like how we calculate moles}

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m = given mass

N = no. of atoms = 2×10^23

M = atomic mass = 32

NA = 6.022×10^23 atoms

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When we do a question based on mole concept, first form a relation:

1 mole = NA atoms = 32g

Case-I : No. of Moles :-

x moles = 2 × 10^23 atoms

==> x moles = 2×10^23/6.022×10^23

=0.3 moles (approx)

Case-II : Mass :-

0.3 moles = x g

x = 0.3×32 = 9.6g

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Hope it helps.......!

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