Answer to Question #169069 in General Chemistry for adriana blanco

Question

1. Determine the number of molecules of 44.4 L of dinitrogen monoxide (N2O).

GUESS Method -

1. Given =

2. Unknown =

3. E = template

____________ x _____ x _ ________ =

1

4. S = put in values (substitute)

___________ x _ ________ x _ ________ =

1

5. S= solve

a. multiple across the top and bottom

i.

b. Divide the top by the bottom

c. Add units to your final answer =

Answer 1

Given = volume of N₂O= 44.4L

Unknown = no. Of molecules of N₂O

We know that 1 mole of any substance contains exactly 22.7 liter of the volume at STP ( standard temperature and pressure) .

Therefore, volume = no. Of moles × 22.7L

44.4 L = no. Of moles ×22.7 L

no. Of moles = 1.955 moles

We know that 1 mole of any substance contains exactly the 6.022×10²³ molecules

Therefore,

Molecules = no. Of moles × 6.022×10²³

Molecus = 1.955×6.022×10²³

Molecules = 11.77×10²³ N₂O molecules