The air exhaled from the lungs of a smoker has a concentration of 24 ppm co. express the concentration as a percent.

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

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

How many molecules are in 6.0 moles of methane