Which of the following compound names correctly matches up with its chemical formula?
#"I")# #"CCl"_4# , carbon tetrachloride
#"II")# #"MgCl"_2# , magnesium dichloride
#"III")# #"CO"# , monocarbon monoxide
#"IV")# #"IP"_5# , iodine pentafluoride
1 Answer
Only
Either there is a typo or only
#"I")# This is carbon tetrachloride, or tetrachloromethane,#"CCl"_4# . This is fine. This is a molecule, so the prefix "tetra-" indicates four chlorine atoms.
#"II")# #"MgCl"_2# is ionic, so it must not have prefixes in its name. These are the simplest to name, and only require#"metal" + "anion name"# . Thus, it is only magnesium chloride.
#"III")# #"CO"# is carbon monoxide. You don't need to include the "mono" prefix on the first element. The second "mono" indicates one#"O"# atom, i.e. mono + oxide#-># monoxide.
#"IV")# #"IP"_5# doesn't exist. Iodine pentafluoride is#"IF"_5# . It is a covalent compound, so the prefix "penta-" indicates five fluorine atoms.
