Question

What is the resulting density when you mix 5.0 L of ethyl alcohol and 12.0 L of water?

Answer 1

if we mix $5L$ of ethyl alcohol and $12L$ of water the volume will be:

$$V = (5 + 12)L = 17 L$$

But the actual volume will be less than $17 L$ . The reason is that molecules that make up the ethyl alcohol are smaller than molecules that make up water. so , the ethyl alcohol molecules cram themselves between the water molecules.

As the volume decreases, density for the same mass will increase.

Answer:

hence the resultant density will increase for the same mass.