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, 23.06.2019 01:00
Chromium(iii) sulfate is a transition metal compound containing the metal chromium and the polyatomic ion sulfate. the oxidation state of chromium in this compound is , and the chemical formula of the compound is ( ) . reset next
Answers: 3
Chemistry, 23.06.2019 05:20
Explain how global warming could have affected yellowstone frog and salamander habitat's, resulting in changes in the populations of these species
Answers: 2
How many moles of HNO3 are present if 5.80×10−2 mol of Ba(OH)2 was needed to neutralize the acid sol...
Mathematics, 15.04.2020 00:34
Mathematics, 15.04.2020 00:34
English, 15.04.2020 00:34
History, 15.04.2020 00:34
Mathematics, 15.04.2020 00:35
Mathematics, 15.04.2020 00:35
Computers and Technology, 15.04.2020 00:35