Question

SELECT ALL THAT APPLY

at STP conditions, 0.25 moles of CO2(g), H2(g), NH3(g)
1. Will contain the same number of molecules
2. Will contain the same number of atoms
3. Will occupy the same volume
4. Will have the same g.f.w

Answer 1

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

Step-by-step 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* 22.4=5.6L`

According to mole concept: 1 mole of a compound contains
`6.022* 10^(23)` number of molecules or 1 mole of an element contains
`6.022* 10^(23)` number of atoms.

We know that the given gases are compounds. Thus, all the three gases will have
`0.25* 6.022* 10^(23)=1.5055* 10^(23)` number of molecules.

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

Answer 2

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