What is a msds?
a document that identifies chemical hazards associated with compounds.
part of a biosafety manual. identifies all chemical reactions.
outlines calibration standards.

A. A document that identifies chemical hazards associated with compounds.

Explanation:

MSDS is an abbreviation that means Material Safety Data Sheet and is a document that describes different characteristics of the products such as chemical properties, chemical compounds, toxicity, health effects, between others; all of these in order to an appropriate human use, and reduce the risk during their manipulation.

Depends on the class of chemical compounds that the product has, the MSDS indicates the labor and environmental cautions.

Have a great day!

if you mean hydrogen and oxygen then water is the product

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.