how many moles of gas are present at a pressure of 2.00 atm in a container that is 10.0 liters in a room that is 25 C

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

What type of electromagnetic radiation has a shorter wavelength than blue light

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?