Question

Number of atoms in 560g of Fe (atomic mass 56g mol–1) is :

• A. Twice that of 70g N
• B. Half that of 20g H
• C. Both (1) and (2)
• D. None of these

Answer 1

Answer: (C)

Both (1) and (2)

Answer 2

(3)

560g of Fe

No. of moles$\frac{560g}{56g} = 10mole$

70 g of N

14g = 1 mole atom of N

70g = 5 moles of N

20g H = 20 moles of H-atoms.