What range of values would be expected for conjugated polymer band gaps?

Why is permeable soil best for plants that need a lot of drainage?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?