Chemistry, 23.07.2019 00:50 kaliemn7oyqxuy
Which of the following in not true about what happens in chemical reactions? a. the arrangement of atoms is somehow changed. b. the bonds of the reactants are broken and/or new bonds are formed in the products. c. energy is involved in the reaction. d. new atoms are formed in the arrangement of molecules.
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, 22.06.2019 03:00
How does a hydroelectric power plant converts energy into energy.
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Chemistry, 22.06.2019 09:30
1. explain hydrogen peroxide, h 2 o 2 properties and decomposition reaction. 2. describe how each of the following natural cycles plays a part in earth’s climate system. (a) the water cycle (b) the carbon cycle
Answers: 1
Chemistry, 22.06.2019 14:30
Chemistry worksheet - i am not sure what they are asking for exactly?
Answers: 1
Which of the following in not true about what happens in chemical reactions? a. the arrangement of...
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