Question

2.Which of the following will not contain same number of atom as 12 g
of magnesium?
(a) 20 g calcium (b)8 g oxygen gas (c) 16 g oxygen atoms (d) 6 carbon
IT NITOTUOLIT NI​

Answer 1

moles of C = 1212=1

moles of Ca = 4020=0.5

moles of O = 1632=2

moles of K = 3940=1.025

As 1 mole of every element contains Avogadro number of atoms. Hence, Equal number of moles of different elements will contain same number of atoms. Therefore, 12 g of Magnesium will have same number of atoms as in 20 g of Calcium.

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