Which best describes the change in energy in this image? (Hint: look at the bars) HELP

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

Agas at 155 kpa and standard temperature has an initial volume of 1.00 l. the pressure of the gas rises to 500 kpa as the temperature also rises to 135°c. what is the new volume? 2.16 l 0.463 l 0.207 l 4.82 l

What is the volume of the fluid in the graduated cylinder with accuracy and measured to the correct degree of precision? 41.2 ml 42.0 ml 41.23 ml 41.89 ml