An unknown substance undergoes a chemical change that gives off heat. Which statement is true?
The types of molecules of the substance before and after the chemical change are the same, and the change was exothermic
The types of molecules of the substance before and after the chemical change are different, and the change was endothermic
The types of molecules of the substance before and after the chemical change are different, and the change was exothermic
The types of molecules of the substance before and after the chemical change are the same, and the change was endothermic
Answers: 2
Chemistry, 22.06.2019 12:30
If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.
Answers: 3
Chemistry, 23.06.2019 00:00
This statement about matter and its behavior is best classified as a
Answers: 1
Chemistry, 23.06.2019 04:20
The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.
Answers: 1
Chemistry, 23.06.2019 08:00
Pl what kind of reaction is this? nahco3 + h2o → co2 + naoh + h2o -composition -decomposition -single replacement -double replacement im leaning more toward single replacement. if im wrong can you explain whyy?
Answers: 2
An unknown substance undergoes a chemical change that gives off heat. Which statement is true?
The...
Chemistry, 25.12.2020 01:00
Chemistry, 25.12.2020 01:00
Mathematics, 25.12.2020 01:00
English, 25.12.2020 01:00
Mathematics, 25.12.2020 01:00
Geography, 25.12.2020 01:00
History, 25.12.2020 01:00
English, 25.12.2020 01:00
Mathematics, 25.12.2020 01:00
Chemistry, 25.12.2020 01:00
Chemistry, 25.12.2020 01:00
Social Studies, 25.12.2020 01:00
Arts, 25.12.2020 01:00