Question

Calcalculate the mass1) 0.5 mole of N2 gas 2) 3.011 into 10 to the power 23 number of N- atoms. what is atomicity? give atomicity of Sulphur and chlorine.​

Answer 1

Calculate the mass of 0.5 mole of N2 gas (mass from mole of molecule). mass of one mole of nitrogen gas is 28 gram(14*2) mass of 0.5 mole of nitrogen is 14 grams. N2 has two atoms and atomic number OF Nitrogen is 7.

we know that ....

1 mole of atoms = 6.022× 10 ^23 atoms

so

6.022x10^23 atoms = 1 mole

1 atoms = 1/6.022×10^23 mole

3.011x10^23 atoms =

=3.011 ×10^23/6.022×10^23

=1/2 mole

and we also know that ....

1 mole of atom = atomic weight

so.

1 mole of nitrogen.= 14 grams

1/2 mole of nitrogen = 1/2x 14 =7grams

so..mass of nitrogen atom = 7grams..ans

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