Ascientist hypothesizes that fertilizer containing 10 percent nitrogen will produce tomato plants with more leaves and blossoms than fertilizer containing 15 percent nitrogen. what is the independent variable? a- amount of nitrogen in fertilizer b- amount of fertilizer appliedc- number of leaves and blossoms on plantsd- number of tomatoes on plants

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

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife