Question

the number of atoms present in 0.5 g atom of nitrogen is same as the atoms in
A. 12g of C
B. 32 g of S
C. 8g of oxygen
D. 24g of Mg

Answer 1

The number of atoms in 1 mole of any substance is 6.022 × 10^23 atoms . This is according to Avogadro's law and it is referred to as Avogadro's number. 
Substances with equal moles will have the same the same number of atoms in them.

Moles  = mass/ molar mass

i) Moles of 0.5 g nitrogen:

          0.5/14
 = 0. 0357 moles

ii) moles of 12 C

molar mass of C = 12
 = 12/12
 = 1 mole

iii) Moles of 32g S
molar mass of S = 32

32/32
= 1mole

iii) Moles of 8 g oxygen

molar mass of O = 16

8/16 = 0.5 moles

iv) Moles of 24 g of Mg

Molar mass of Mg = 24

24/24 = 1 mole 

NB: From the list given there is no element with same number of atoms as 0.5 g of Nitrogen.  The question should have read 0.5 MOLES of Nitrogen - then the answer would have been 8g of oxygen

Answer 2

Answer:

Explanation:

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