Complete the sentence

Ice crystals forming on a

window is a

physical change

chemical change

Eva is performing an experiment to determine which type of disinfectant kills the most bacteria. She has six plates of the same kind and amount of bacteria.

Which is a physical property of milk? a) Milk has a pH ranging from 6.4 to 6.8. b) Milk spoils when left unrefrigerated over several days. c) Milk boils at about 212°F (100°C). d) Milk curdles when mixed with vinegar.

Carbon-12 is the most common isotope of carbon. It has 6 protons, 6 neutrons, and 6 electrons. Of its 6 electrons, 4 are valence electrons. How many covalent bonds can a carbon atom form? A. 1 B. 4 C. 6 D. 12

Which of the following materials is a good conductor of electric current? a rubber tire a light bulb filament a glass pane a silver spoon

which part of the blood is correctly paired with its function

If crown b is more dense than crown a then which is pure gold

In an ecosystem, a population can be defined as A. all the individuals of a species that exist together at a given place and time. B. all individuals of a species born in a specified month in every region of the world. C.

How many grams of NH3 are needed to provide the same number of molecules as in 0.55 grams of SF6?

Round 129.752416 to the requested number of significant figure a. 3 significant figures c. 6 significant figures_22 b. 4 significant figures d. 7 significant figures

What is the [oh-] in a sample of lime juice with a ph of 2.0?