An experiment is performed in which a crystalline substance is added to a beaker filled with room-temperature water. The following observations were made:
1. The crystals dissolve.
2. A precipitate forms.
3. The bottom of the breaker feels warm to the touch.
4. Bubbles begin to form in the water.
Which observations are evidence that a chemical reaction took place?
Answers: 3
Another question on Chemistry
Chemistry, 21.06.2019 22:30
Omg imgonnafailnfiedkla use complete sentences to explain how the mass of hydrogen is conserved during cellular respiration.
Answers: 1
Chemistry, 22.06.2019 09:00
This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.
Answers: 2
Chemistry, 22.06.2019 09:30
In 2002, the rare earth elements mine in mountain pass, california was closed because
Answers: 1
You know the right answer?
An experiment is performed in which a crystalline substance is added to a beaker filled with room-te...
Questions
English, 23.05.2020 03:04
Mathematics, 23.05.2020 03:04
History, 23.05.2020 03:04
Mathematics, 23.05.2020 03:04
History, 23.05.2020 03:04
Social Studies, 23.05.2020 03:04
