Aplatinum ball with a mass of 100 g is removed from a furnace and dropped into 400 g of water at 0 ◦c. if the equilibrium temperature is 10◦c and the specific heat of platinum is 130 j/kg◦c, what was the temperature of the furnace?

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

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.