A 400.0 mL bottle labeled H₂O₂ 3.0% (v/v) contains 12 mL of H₂O₂.
What does percent by volume refer to?
The percent by volume of a solution is defined as the ratio of the volume of solute that is present in a solution, relative to the volume of the solution.
It is typically expressed as a percentage.
A bottle of antiseptic hydrogen peroxide (H₂O₂) is labeled 3.0% (v/v). We can calculate the milliliters of H₂O₂ in 400.0 mL of the solution using the definition of percent by volume.
% (v/v) = (v / v(s)) × 100%
v = % (v/v) × v(s) / 100%
v = 3.0 % × 400.0 mL / 100% = 12 mL
where,
- % (v/v) is the percent by volume.
- v is the volume of the solute.
- v(s) is the volume of the solution.
A 400.0 mL bottle labeled H₂O₂ 3.0% (v/v) contains 12 mL of H₂O₂.
Learn more about percent by volume here: https://brainly.com/question/19379932
