A 2.5 L gas in a cylinder fitted with a movable piston is originally at 25 °C and 1.00 atm pressure. The gas is then subjected to a pressure of 0.85 atm at the same temperature. The final volume of the gas is L.

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Based on its chemical properties, identify the position of each chemical family on the periodic table.