Question

the number of atoms present in 0.5 gram atom of nitrogen is same as the atoms in

Answer 1

Atomic mass of nitrogen = 14 g

Therefore, mass of 1 mole of nitrogen = 14g

Now, 1 mole = 6.022 x 1023 atoms

Since, 1 g-atom = 1 mole

0.5 g-atom = 0.5 moles

Therefore, no. of atoms in 0.5 moles of Nitrogen = 6.022 x 1023 x 0.5

  = 3.011 x 1023

Now,

12 g carbon = 1 mole carbon

32 g sulphur = 1 mole sulphur

8 g oxygen = 0.5 mole oxygen

24 g magnesium = 1 mole magnesium

Number of atoms in 0.5 mole oxygen = = 3.011 x 1023


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