Answer:
Percent by volume = 18%
Explanation:
Given data:
Volume of ethanol = 45 mL
Volume of solution = 250 mL
Solution:
In given problem there is 45 mL of solute while volume of Solvent is,
250 mL - 45 mL = 205 mL
The volume of solution (solvent + solute) = 250 mL
The percent by volume is calculated through following formula:
Percent by volume = Volume of solute / Volume of solution × 100
Percent by volume = 45 mL / 250 mL × 100
Percent by volume = 0.18 × 100
Percent by volume = 18%
