Carbohydrates are compounds contains carbon, hydrogen, and oxygen in which the hydrogen to oxygen ratio is 2: 1. a certain carbohydrate contains 40.0 percent carbon by mass. calculate the empirical and molecular formula of the compound if the approximate mass is 178grams

The first element on the periodic table of elements is carbon. a. true b. false

1) this is the structure in the cell nucleus that houses a cell's genetic information

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