Question

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

Answer 1

Solution :

Atomic mass of nitrogen $=14\;g

Therefore , mass of 1 mole of nitrogen =14g

Now, 1 more =6.022×1023atoms

Since, 1g−atom=1 more

0.5g−atom=0.5moles

Therefore no of atoms in 0.5 moles of Nitrogen =6.022×1023×0.5

=3.011×1023

Now,

12g Carbon =1 mole carbon

32g sulphur = 1 mole sulphur

8g oxygen =0.5 mole oxyen

24g magnesium =1 mole magnesium

Number of atoms in 0.5 mole oxygen =3.011×1023

Answer 2

3.01*1023

Explanation:

gram of atom means mole

1 mole contain 6.02*1023 atom(which is known as avogardho's number)

so... 0.5 mole contain 0.5*6.02*1023=3.01*1023 atom