Chemistry, 29.09.2020 15:01 angel34emb
Which statement correctly describes a physical change?
involves breaking and creating chemical bonds but not changing a phase
B. may involve a change in phase but does not involve a change in the molecular structure
OC. may involve converting two or more substances into new substances
D. involves changes at the molecular level
involves energy transfer and change in color
Answers: 1
Chemistry, 22.06.2019 22:00, jlegrand9098
4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.
Answers: 2
Chemistry, 23.06.2019 02:40, sherlock19
How can a mixture of salt water be separated into salt and water
Answers: 1
Which statement correctly describes a physical change?
involves breaking and creating chemical bond...
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