# Which has more number of atoms? 100g of N2 or 100g of NH3 srisaji@yahoo.com

Number of moles is determine by the formulae :-
n = given mass/ molar mass
Where n stands for number of moles
given mass for both case is 100 g
Molecular mass of N2 is (14 + 14) = 28 g per mole
Molecular mass of NH3 is {14 +(3$×$1)} = 17 g per mole
As Atomic mass of Nitrogen is 14 and atomic mass for hydrogen is 1 g per mole.
1. number of mole of N2 = 100/ 28 = 3.57 mole
As 1 molecule of dinitrogen contain 2 atoms,
Therefore number of atoms present in 3.57 mole of nitrogen is
3.57 $×$2
= 7.14 mole
2. Number of mole of NH3 = 100/17
= 5.88
As 1 molecule of ammonia contain = 3 atoms
Therefore,
5.88 moles of ammonia contain = 3 $×$ 5.88
= 17.65 atoms
Hence 100g of ammonia contain more number of atoms.

• 30

BOTH WILL BE SAME AS NO OF ATOMS WILL BE EQUAL TO 6.022*10 TO THE POWER 23

• -6

Both will be the same.

• -7
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