Santiago is a chemist working to make a new kind of antacid, which is a medicine
that helps with stomach pain. He mixed
two powdery solid substances together
in a sealed container. The diagram above
shows the repeating groups of atoms that
make up the two starting substances.
After mixing, Santiago found two liquid
substances in the sealed container.
(Nothing had escaped.) Which of the
diagrams to the left shows the repeating
groups of atoms that make up the ending
substances?

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

The best solution for preventing harm to people and pets from severe hurricanes involves determining and warning residents about what

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?