In preparing a saturated solution of KNO3 at 40°C a scientist initially adds 30.g of solute in 100.g of water. How much additional KNO3 must be added to reach the saturation point. A)
64g

B)
75g

C)
18g

D)
34g

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.