A bottle of rubbing alcohol is labeled 70% (v/v) how many milliliters of isopropyl alcohol are in a 400ml bottle of this solution?

The number of milliliters of isopropyl alcohol that are in a 400 ml bottle of this solution is 280 Ml

calculation

% V/V = volume of solute / volume of solution x 100

Let the volume of solute be = y ml

the volume of solution = 400 ml

convert 70% to fraction = 70/100

by substituting the value in the equation

= y ml / 400 ml = 70/100

by cross multiplication

100y = 400 x70

100y = 28000

y = 280 ml