Home NCERT Solutions NCERT Exemplar CBSE Sample Papers NCERT Books Class 12 Class 10
Question 7

What is the mass of—

(a) 1 mole of nitrogen atoms?
(b) 4 moles of aluminium atoms (Atomic mass of aluminium = 27)?
(c) 10 moles of sodium sulphite (Na2SO3)?

Answer

1 mole of any particle = Relative mass of that particle in grams

1 mole of any molecule = molecular mass in grams

(a) 1 mole of nitrogen atom = 14 grams
(b) 1 mole of aluminium atom = 27 grams

     4 mole of aluminium atom = 27 x 4 = 108 grams
(c) Na2SO3 = 2 x atomic mass of Na + 1 x atomic mass of sulphur 3 x atomic mass of O

     = 2 x 23 + 1 x 32 + 3 x 16
     = 46 + 32 + 48 = 126 g

1 mole of Na2SO3 = 126 g 

10 moles of Na2SO3 = 126 x 10 = 1260 grams

Popular Questions of Class 9 Science

Recently Viewed Questions of Class 9 Science

Write a Comment: