Why do chemical properties change?
What do the prefixes exo- and endo- mean?
What happens to...
Chemistry, 11.11.2020 18:50 ayandjay01
Why do chemical properties change?
What do the prefixes exo- and endo- mean?
What happens to heat in an exothermic reaction?
What happens to heat in an endothermic reaction?
Answers: 3
Chemistry, 22.06.2019 15:00
Which are forms of frozen water? check all that apply. dew frost hail rain sleet
Answers: 2
Chemistry, 22.06.2019 19:00
Which change to the system wood cause the freely-moving piston to lower?
Answers: 1
Chemistry, 23.06.2019 06:40
1.) which of the following is a molecule but not a compound? a.he b.f2 c.h2o d.ch4 2.) what is a physical combination of substances? a.a compound b.a molecule c.a mixture d.an element 3.) what is a chemical combination of substances? a.a compound b.an atom c.a mixture d.an element 4.) what is the relationship between the solute and solvent in a solution? a.they form a compound b.they form a mixture c.they form molecules d.they form chemical bonds 5.) the gases in air dissolve in water. what would be one way to reduce the amount of a gas dissolved in water? a.add more water b.reduce the air pressure c.increase the air pressure d.stir the water 6.) how would you determine the solubility of a substance? a.find how well it dissolved various substances. b.find the mass and the volume of the substance. c.find the temperature at which the substance evaporated. d.find how much i was able to dissolve in a solute. 7.) the periodic table organizes all of the kinds of a.molecules. b.compounds. c.atoms. d.ions. 8.)what distinguishes two substances combined to become a compound vs. two substances combined to become a mixture? a.whether they can be easily separated b.whether they chemically bond together c.whether they both are visible d.whether they are heterogeneous 9.) the principle components of air are: n2 78% o2 21% ar 0.95% co2 0.038% this is a solution of a.molecules and atoms. b.molecules. c.compounds and molecules. d.atoms.
Answers: 1
Chemistry, 23.06.2019 09:00
What factor besides temperature affects the boiling point of water? a. mass b. number of moles c. volume d. pressure
Answers: 3
Physics, 07.12.2020 17:40
Mathematics, 07.12.2020 17:40
Computers and Technology, 07.12.2020 17:40
Computers and Technology, 07.12.2020 17:40
Social Studies, 07.12.2020 17:40
English, 07.12.2020 17:40
History, 07.12.2020 17:40
Mathematics, 07.12.2020 17:40
Mathematics, 07.12.2020 17:40
Business, 07.12.2020 17:40
Physics, 07.12.2020 17:40
Physics, 07.12.2020 17:40
Mathematics, 07.12.2020 17:40