Question

SELECT ALL THAT APPLY

Answer 1

At STP conditions, 0.25 moles of CO2(g), H2(g), NH3(g)

The answers are:
1. Will contain the same number of molecules 
3. Will occupy the same volume

Answer 2

Answer: The correct answer is Option 1 and Option 3.

Explanation:

We are given:

0.25 moles of $CO_2,H_2\text{ and }NH_3$

STP conditions states that 1 mole of a gas occupies 22.4 L of volume.

The volume occupied by all the gases at STP will be $0.25\times 22.4=5.6L$

According to mole concept: 1 mole of a compound contains $6.022\times 10^{23}$ number of molecules or 1 mole of an element contains $6.022\times 10^{23}$ number of atoms.

We know that the given gases are compounds. Thus, all the three gases will have $0.25\times 6.022\times 10^{23}=1.5055\times 10^{23}$ number of molecules.

Hence, the correct answer is Option 1 and Option 3.