Solution: In this question, we are given of all the reactants and product, so we need to find the total first through the formula. = -32.89 - (2*0 + 209.2) =-242.1 (Be careful about significant figures).
Depending on the stain technique it can take anywhere from 2 to  24-hours for the stain to dry. For cabinets, you should wait the  entire 24-hours to make sure the stain is â¦not still tacky and to  prevent smudges on the finish.
Second truth: After whitening (bleaching), teeth become dehydrated temporarily, making them more susceptible to picking up stain. That's why we advise patients to avoid dark staining things (tobacco, coffee, red wine, etc) for the first 24-48 hours.