Answers: 2
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, 22.06.2019 18:50
Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.
Answers: 1
Write the electronic configuration of the Na +, Mg2 +, Ca2 + and Rb + ions. Research the size of the...
History, 23.08.2020 14:01
Mathematics, 23.08.2020 14:01
Geography, 23.08.2020 14:01
History, 23.08.2020 14:01
Mathematics, 23.08.2020 14:01
Mathematics, 23.08.2020 14:01
Mathematics, 23.08.2020 14:01
History, 23.08.2020 14:01
History, 23.08.2020 14:01
Advanced Placement (AP), 23.08.2020 14:01
Mathematics, 23.08.2020 14:01