Could the other molecules in this simulation (argon, oxygen, and water) be considered pure substances? Explain your thinking.

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Why doesn't heat added to water make the tempature rise above 100c

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.