Again watched a demonstration in which a scientist combine two substances in a sealed container and analyze the results the ending substance did not look the same as the starting substances he was given a diagram with the repeating groups of atom that make up the starting substances he created a model of the repeating groups of atom that make up the ending substances. Does the model correctly show why the properties of the ending substances are different from the properties of the starting substances? Describe what is right or wrong

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

Nonpoint source pollution is difficult to control because it

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work