Which of the following has 1.2 x 10^24 hydrogen atoms?
a) 1 mole of methane (ch4)
b) 2 moles of ammonia (nh 3)
c) 2 moles of hydrogen gas (h 2)
d) 1 mole of water (h 20)

Answer : The correct option is, (D) 1 mole of water

Explanation :

As we know that, 1 mole of substance contains number of atoms.

(A) 1 mole of methane

As, 1 mole of methane contains 3 moles of hydrogen atoms.

So, 1 mole of methane contains of hydrogen atoms.

The number of hydrogen atoms present in 1 mole of methane are

(B) 2 moles of ammonia

As, 1 mole of ammonia contains 3 moles of hydrogen atoms.

So, 2 mole of ammonia contains of hydrogen atoms.

The number of hydrogen atoms present in 1 mole of ammonia are

(C) 2 moles of hydrogen gas

As, 1 mole of hydrogen gas contains 2 moles of hydrogen atoms.

So, 2 mole of hydrogen gas contains of hydrogen atoms.

The number of hydrogen atoms present in 1 mole of hydrogen gas are

(D) 1 mole of water

As, 1 mole of water contains 2 moles of hydrogen atoms.

So, 1 mole of water contains of hydrogen atoms.

The number of hydrogen atoms present in 1 mole of water are

Hence, the correct option is, (D) 1 mole of water

the answer would be a

the product of the pressure and volume is also constant