Answers: 1
Chemistry, 21.06.2019 20:30
In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask
Answers: 2
Chemistry, 21.06.2019 23:00
The drawing represents the movement of particles in a substance. what changes of state can this substance undergo
Answers: 1
Chemistry, 22.06.2019 03:30
Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction
Answers: 2
Chemistry, 22.06.2019 11:00
Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.
Answers: 1
Vitamins are not organic substances. a. trueb. false...
History, 28.10.2020 23:20
Mathematics, 28.10.2020 23:20
Chemistry, 28.10.2020 23:20
English, 28.10.2020 23:20
Mathematics, 28.10.2020 23:20
English, 28.10.2020 23:20
Mathematics, 28.10.2020 23:20
Mathematics, 28.10.2020 23:20
Chemistry, 28.10.2020 23:20
Social Studies, 28.10.2020 23:20