Respuesta :

Answer:

0.5mole

Explanation:

Given:

Volume of water vapor at STP = 11.2L

Unknown:

Number of moles  = ?

Solution:

To solve this problem, we use the expression below;

   A mole of a gas occupies a volume of 22.4L at STP;

   Number of moles  = [tex]\frac{volume of gas}{22.4}[/tex]  

So;

  Number of moles  = [tex]\frac{11.2}{22.4}[/tex]   = 0.5mole

The number of moles of steam is 0.5mole