23. Examine the graph below, and answer the following questions: a. What is the boiling point of the sub- stance? What is the melting point? b. Which state is present at 30°C? c. How will the substance change if energy is added to the liquid at 20°C? 80 60 Temperature (°C) 40 20 0 Energy

Is laundry detergent an acid or a base?

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)

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 ?