A rigid, brittle polymer used in disposable food containers. The backbone of the polymer contains phenyl rings. Polyvinyl chloride A polymer produced through a condensation reaction, with applications ranging from clothing to packaging. Polyethylene terephthalate A rigid polymer used often in construction materials. The structure contains a halogen. Polyethylene terephthalate A flexible polymer used in the manufacturing of grocery bags. The molecular structure is ( C 2 H 4 ) n . Choose...

the answer would be b i believe

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.

i belive it is water

hypostyle hall;