Question

while the pennies are drying, put the paper clips in the bowl of solution. let them soak until their color changes from silver to copper. it may take an hour or more, so be patient! finally, rinse off the paper clips with water. place them on a paper towel to dry. which step comes after removing the pennies from the solution? add the paper clips to the bowl. rinse the paper clips with vinegar. mix the paper clips with salt.

Explanation:

After removing pennies, the next step related to paper clips (after soaking) would involve rinsing. The option "Rinse the paper clips with vinegar" aligns with typical post - soaking cleaning steps in such experiments. "Add the paper clips to the bowl" is the step before soaking (not after removing pennies), and "Mix the paper clips with salt" is not a logical next step after removing pennies and soaking paper clips.

Answer:

Rinse the paper clips with vinegar.