Question

Calculate the number of molecules present in: a) 1g N2 b) 1g NH3​

Answer 1

Answer:

option a is the correct, 1gN2

Answer 2

Answer:

Explanation:

1g of n2

to find molecules we use the formula :-

moles x avagadro number(6.022x10^23)

given mass =1

molar mass of n2=14 x 2( 14 atomic mass of nitrogen)=28

moles= given mass/molar mass

         = 1/28

         = 0.035 moles

molecules= 0.035 x6.022x10^23

                = 0.21077