Question

$\huge{NEET - 2020}$
Which one of the following has maximum number of atoms ?
a) 1 gram of Mg(s)
b) 1 gram of 02(g)
c) 1 gram of H(s)
d) 1 gram of Ag(s)​

Answer 1

Given :

• a) 1 gram of Mg(s)
• b) 1 gram of 02(g)
• c) 1 gram of H(s)
• d) 1 gram of Ag(s)

To find :

• Which of those has maximum number of atoms

Solution :

At first to calculate number of atoms in 1 gram of Mg(s) :

→ Molar mass of Mg(s) = 24 g

Now number of atoms :

→ Number of atoms = (Given mass/Molar mass) × 6.022 × 10²³

→ Number of atoms = (1/24) × 6.022 × 10²³

→ Number of atoms = 2.51 × 10²²

__________________________

Now calculating number of atoms in 1 g of O2(g) :

→ Molar mass of O2(g) = 32 g

Now number of atoms :

→ Number of atoms = (1/32) × 6.022 × 10²³

→ Number of atoms = 1.88 × 10²²

__________________________

Now calculating number of atoms in 1 g of H(s) :

→ Molar mass of H(s) = 1 g

Now number of atoms :

→ Number of atoms = (1/1) × 6.022 × 10²³

→ Number of atoms = 6.022 × 10²³

__________________________

Now calculating number of atoms in 1 g of Ag(s) :

→ Molar mass of Ag(s) = 108 g

Now number of atoms :

→ Number of atoms = (1/108) × 6.022 × 10²³

→ Number of atoms = 5.58 × 10²¹

__________________________

Now comparing all the number of atoms, we can conclude that 1 gram of H(s) has maximum number of atoms.

Therefore,

c)1 gram of H(s) has maximum number of atoms.

Answer 2

Answer:

c ..... 1 GRAM OF H (S)

Explanation:

C ANSWER IS CORRECT ANSWER