Chemistry, 19.01.2020 06:31 joshvslogic341
Which is an example of reversible physical change ? peeling an apple? chopping wood? cutting hair ? melting ice ? now
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Chemistry, 22.06.2019 12:30
Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.
Answers: 3
Chemistry, 23.06.2019 07:30
Type the letter that represents the correct location for each particle type below. the neutron is found at __ the electron is found at __ the proton is found at __
Answers: 2
Chemistry, 23.06.2019 23:40
What is the difference between a weak and strong base? only some of the molecules of a weak base dissociate to produce hydrogen ions when mixed with water, but all of the molecules of a strong base dissociate to produce hydrogen ions. strong bases result in the production of hydronium, while weak bases produce hydroxide ions. only some of the molecules of a weak base dissociate to produce hydroxide ions when mixed with water, but all of the molecules of a strong base dissociate to produce hydroxide ions. strong bases react with acids to produce water, but weak bases do not react at all.
Answers: 1
Which is an example of reversible physical change ? peeling an apple? chopping wood? cutting hair...
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