Question

calculate the volume in \( dm ^{3} \) occupied by \( 60 g \) of ethane at STP. Define: Molarity and molo lity

Answer 1

Moles of Ethane = 60/30 = 2 moles.
Now, we know that:

1 mole of gas occupies 22.4 litres volume at STP.
So, 2 moles of Ethane will occupy :

\(22.4 \times 2=44.8\) litres

Now, 1 litre = 1 dm³ 
So, volume of Ethane = 44.8 dm³.

Molarity is the ratio of the moles of a solute to the total liters of a solution. The solution includes both the solute and the solvent. Molality, on the other hand, is the ratio of the moles of a solute to the kilograms of a solvent.