Name the substances at home that remove rust, blood stains and ink stains

White vinegar removes rust.

Hydrogen peroxide removes bloodstains.

Hairspray removes inkstains.

Explanation:

You can use a number of household items to remove these types of stains, but I have listed the ones I have used personally to greatest success. With bloodstains, water usually works if you can get there fast enough before it dries. Milk apparently also works for inkstains, but I've never tried!

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

fe 55.85 g/mol and h2o 18.02 g/mol.