If the total volume of mouthwash prepared is 500ml, what proportion does the lidocaine viscous contribute based on the initial formula?

To determine the proportion of lidocaine viscous in a total volume of 500 ml of mouthwash, we first need to know the amount of lidocaine viscous included in the initial formulation. If the formulation specifies that the lidocaine viscous accounts for a certain volume relative to the total volume of the mouthwash, we can express that amount as a fraction of the total volume.

For instance, if the initial formula indicates that there are 50 ml of lidocaine viscous in a total volume of 500 ml, then the proportion contributed by lidocaine viscous would be calculated as follows:

Amount of lidocaine viscous / Total volume of mouthwash = 50 ml / 500 ml = 1/10.

This calculation shows that lidocaine viscous makes up one-tenth of the mouthwash volume, which aligns with the first option. Therefore, the correct proportion reflects the specified relationship of lidocaine viscous to the overall formulation, validating the answer provided.