AP EAMCET202123 Aug 2021Morning ShiftChemistrySome Basic Concepts of ChemistryActual
If one atom of an element X weighs 6.643 10⁻²³ ~g . Then, find the number of moles of atoms in 50 ~kg of element X .
Options
- A500 moles
- B125 moles
- C1250 moles
- D50 moles
Correct answer
C. 1250 moles
Step-by-step solution
Number of atoms in 50 ~kg = 50 1000 6.643 10⁻²³ = 50000 10²³ 6.643 atoms aligned Number of moles & = Number of atoms Avogadro's Number & = 50000 10²³ 6.643 6.02 10²³ & =1250.3 moles 1250 moles aligned