Changes in Matter 6
Mary has two beakers. Beaker A contains a colorless liquid while beaker B contains a blue liquid. Mary adds a few drops of the blue
liquid from beaker B into beaker A and observes that a pink solid is formed. What is the best conclusion that can be drawn from
this?
OA.
The temperature in beaker A decreased so that the substances froze.
ОВ.
The two substances combined to form a new substance.
OC
The substance from beaker B can be either blue or pink
OD
The substance from beaker A can be either colorless or pink.
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Both 1,2−dihydronaphthalene and 1,4−dihydronaphthalene may be selectively hydrogenated to 1,2,3,4−tetrahydronaphthalene. one of these isomers has a heat of hydrogenation of 101 kj/mol (24.1 kcal/mol), and the heat of hydrogenation of the other is 113 kj/mol (27.1 kcal/mol). match the heat of hydrogenation with the appropriate dihydronaphthalene.

Fugu, also known as puffer fish, is a sushi delicacy that can also be lethal. puffer fish contain a powerful toxin that can kill an adult a few hours after ingestion. sushi chefs who prepare fugu must be specially trained because any contamination of the toxin-free areas of the fish can be deadly. recently this toxin has been put to good use, as scientists have discovered that a purified form of it can treat severe pain in cancer patients. this recent scientific discovery would fall under which area of chemistry? applied biochemistry pure organic chemistry pure physical chemistry applied inorganic chemistry

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.