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 20:30
12. complete each of the following word equations for synthesis reactions. a. sodium + oxygen -> b. magnesium + fluorine -> 13. complete and balance the equations for the decomposition reactions. a. hgo -> [with the triangle heat symbol above the arrow] b. h2o(l) -> [with "electricity" written above the arrow]
Answers: 1
Chemistry, 22.06.2019 07:00
The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f
Answers: 1
Chemistry, 22.06.2019 12:30
When a scientific theory has been tested and proved by the scientific community, it becomes a law
Answers: 2
Sound generally travels faster through solids than through gases because the particles (atoms or mol...
Mathematics, 22.01.2021 01:00
Mathematics, 22.01.2021 01:00
Biology, 22.01.2021 01:00
Chemistry, 22.01.2021 01:00
Biology, 22.01.2021 01:00
Mathematics, 22.01.2021 01:00
History, 22.01.2021 01:00
Mathematics, 22.01.2021 01:00
Mathematics, 22.01.2021 01:00
English, 22.01.2021 01:00
Mathematics, 22.01.2021 01:00
History, 22.01.2021 01:00