Calculate the number of atoms in each of the following (i) 52 moles of Ar (ii) 52 u of He (iii) 53 g of He

  • 1 mole of Ar = 6 . 022 × 1023 atoms of Ar

52 mol of Ar = 52 × 6.022 × 1023 atoms of Ar

= 3.131 × 1025 atoms of Ar

  • Atomic mass of He = 4amu

4amu is the mass of He atoms = 1

Therefore, 52 amu is the mass of He atoms=0.25×52=13 atoms of He

  • Gram atomic mass of He = 4g

4g of He contains = 6.022 × 1023 atoms

Therefore, 52 g of He contains 6.022 × 1023 atoms/4 x 52 = 7.83 × 1024atoms

Was this answer helpful?

  
   

0 (0)

Upvote (0)

Choose An Option That Best Describes Your Problem

Thank you. Your Feedback will Help us Serve you better.

Leave a Comment

Your Mobile number and Email id will not be published. Required fields are marked *

*

*

BOOK

Free Class

Ask
Question