During a flame test, ions of a specific metal are heated in the flame of a gas burner. a
characteristic color of light is emitted by these ions in the flame when the electrons
a gain energy as they return to lower energy levels
b gain energy as they move to higher energy levels
emit energy as they return to lower energy levels
1 emit energy as they move to higher energy levels

Chemistry worksheet - i am not sure what they are asking for exactly?

High-pressure liquid chromatography (hplc) is a method used in chemistry and biochemistry to purify chemical substances. the pressures used in this procedure range from around 500 kilopascals (500,000 pa) to about 60,000 kpa (60,000,000 pa). it is often convenient to know the pressure in torr. if an hplc procedure is running at a pressure of 1.03×108 pa , what is its running pressure in torr?

Elizabeth has two separate samples of the same substance. sample is in the liquid state, and the other is in the solid state. the two samples most likely differ in which property?