Question

how many atoms are there in 68 gram of NH3?

Answer 1

Answer:

Explanation:Molar mass of NH3 =17

Given mass =68

So,number of moles of NH3= GIVEN MASS/molar mass

therefore 68/17= 4

So number of atoms of NH3 = no. Of moles× avogadro no.

4×6.022×10^23= 24.088×10^23

Or 2.4088×10^24

Answer 2

To get the atoms our first approach will be to calculate moles

Moles = given mass÷molar mass

=68÷17=4

Now total atoms are atoms of nitrogen and atoms of hydrogen ie 4 atoms

Total atoms = moles ×4 × 6.02×10^3

Hope this is helpful to u