If baking soda ( sodium hydrogen carbonate) is heated strongly , the following reaction occurs: 2NaHCO 3 (s) Na 2 CO 3 (s)+H 2 O(g)+CO 2 (g) Calculate the mass of sodium carbonate that will remain if a 1.48 g sample of sodium hydrogen carbonate is heated.

What is the force of attraction between the particles in a salt crystal

How many neutrons does a atom of cobalt have?

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