Asolution of cough syrup contains 5.00% active ingredient by volume. if the total volume of the bottle is 51.0 ml , how many milliliters of active ingredient are in the bottle?

The total volume of the bottle is 51.0ml and the active ingredient is 5.00% by volume then multipy 0.05 x 51.0 = 2.55 ml of active ingredient. Being 5% by volume means that of the total 51.0 ml, 5% of it is active ingredient and the balance is inactive or may even be water. 

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