Which statement best describes how this puddle demonstrates that matter is too small to be seen without magnification? a persons feet standing next to a puddle on a sidewalk The light causes a reflection to appear on the surface of the water. The person cannot see the bottom of the puddle. The twig floats on top of the puddle of water. The water cannot be seen when it evaporates.

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.

Asolution contains 180 g of glucose (c6h12o6) and 162 g of water. what is the mole fraction of glucose?

Select the word from the list that best fits the definition the nuclear family into which a person is born or adopted.