The problem say what is the volume (in kl) of 3.7505 x 10^4 mg of iron? iron has a density of 7.87 g/ml. use correct significant figures

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

How many grams of phosphorus are contained in 5.09 moles of phosphorus?

What methods could you use to solubilize calcium carbonate