Which set of procedures and observations indicates a chemical change?
(1) ethanol is added to...
![subject](/tpl/images/cats/himiya.png)
Chemistry, 23.08.2019 10:20 ivannis875
Which set of procedures and observations indicates a chemical change?
(1) ethanol is added to an empty beaker and the ethanol eventually disappears.
(2) a solid is gently heated in a crucible and the solid slowly turns to liquid.
(3) large crystals are crushed with a mortar and pestle and become powder.
(4) a cool, shiny metal is added to water in a beaker and rapid bubbling occurs.
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 04:31
2ki + pb(no3)2 → 2kno3 + pbi2 determine how many moles of kno3 are created if 0.03 moles of ki are completely consumed.
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 06:30
Generally, observed behavior that can be formulated into a statement, sometimes mathematical in nature, is called a(n): a. observation. b. measurement. c. theory. d. natural law. e. experiment.
Answers: 2
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 10:30
Using the periodic table, complete the following. element: hydrogen symbol: hâ‚‚ molecular weight: g mass of one mole: g/mol
Answers: 3
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 10:30
Chemical bonds result from the interaction of the from two or more atoms. a. protons b. electrons c. neutrons d. nuclei
Answers: 2
You know the right answer?
Questions
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 20.12.2020 09:40
![question](/tpl/images/cats/mat.png)
Mathematics, 20.12.2020 09:40
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 20.12.2020 09:40
![question](/tpl/images/cats/en.png)
English, 20.12.2020 09:40
![question](/tpl/images/cats/mat.png)
Mathematics, 20.12.2020 09:40
![question](/tpl/images/cats/biologiya.png)
Biology, 20.12.2020 09:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
English, 20.12.2020 09:50
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 20.12.2020 09:50
![question](/tpl/images/cats/mkx.png)
Arts, 20.12.2020 09:50
![question](/tpl/images/cats/geografiya.png)
Geography, 20.12.2020 09:50