Question

Which substance among the following contains a maximum number of atoms?

• A. 1 mole of Water(H₂O)
• B. 2 mole of Oxygen(O₂)
• C. 1.5 mole of Ammonia(NH₃)
• D. 1 mole of rhombic Sulfur (S₈)

Answer 1

The correct option is D

1 mole of rhombic Sulfur (S₈)

Explanation For Correct Option:

1 mole of rhombic Sulfur (S₈)

A number of atoms in 1 mole of rhombic Sulfur (S₈)

One mole of a substance has 6.023×10²³ atoms.

1 molecule of rhombic sulfur has 8 atoms.

So, 1 mole of rhombic sulfur has atoms= 8 X 6.023×10²³ atoms.

= 48.184 ×10²⁴ atoms.

This is the maximum number of atoms from all the options

Explanation For Incorrect options:

1 mole of water(H₂O)

One mole of a substance has 6.023×10²³ atoms.

1 molecule of water has a total of three atoms, 2 hydrogens, and 1 oxygen.

So, 1 mole of water has atoms= 3 X 6.023×10²³ atoms.

= 1.807×10²⁴ atoms.

2 mole of oxygen(O₂)

One mole of a substance has 6.023×10²³ atoms.

1 molecule of oxygen has a total of 2 oxygen atoms.

So, 2 mole of oxygen atom has atoms= 2 X 2 X 6.023×10²³ atoms.

= 24.092×10²⁴ atoms.

1.5 mole of Ammonia(NH₃)

One mole of a substance has 6.023×10²³ atoms.

1 molecule of ammonia has a total of 1 nitrogen and 3 hydrogen atoms.

So, 1.5 moles of ammonia atom have atoms= 1.5 X 4 X 6.023×10²³ atoms.

= 36.138×10²⁴ atoms.

Hence, option(d) is correct.