Please answer in an experiment, a student measured the amount of vitamin C in 200 mL of orange juice as 65 mg. The label on the carton stated the amount was 95 mg. What was the percent error in the measurement by the student? Express answer to one decimal place.

List four observations that indicate that a chemical reaction may be taking place

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Match the mixture with the substance// i really need on this guys (it’s a pic btw)