7. How much 6% solution can you make by diluting 350 mL of a 15% solution

We know that the formula to mix chemical solutions is: C1V1 = C2V2

where C represents the concentration of the solute, and V represents volume in milliliters or ml.

In this case, we have:

0.06V1 = 0.15*350

Solving for 'V1' we have:

V1 = (0.15*350) / 0.06 = 52.5/0.06 = 875

Therefre I can make 875 mL of a 6% solution by diluting 350 mL of a 15% solution.