Organic molecules form bonds and inorganic compounds form bonds.

a)ionic / covalent
b)covalent / ionic
c)ionic / polar covalent
d)covalent / polar covalent

Which property is used to identify the origin of an igneous rock? color density hardness crystal size

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

Prior to the development of dna fingerprinting, blood type could be used to determine possible parentage. although it might prove someone was not a parent, it could not show if someone was positively the parent, only that he or she might be a parent. which of the following is a true statement that can be made about parentage based on blood typing?