Chemistry Unit 3
What is the oxidation number of iodine in KIO4?
+7
An unknown element X can form a compound with the formula XBr3. In which group on the Periodic Table would element X be found?
13
What is the chemical formula for copper(II) hydroxide?
Cu(OH)2
Write the chemical formula of cuprite.
Cu2O
What is the chemical formula for iron(III) oxide?
Fe2O3
Which group on the Periodic Table of the Elements contains elements that react with oxygen to form compounds with the general formula X 20?
Group 1
In which substance does hydrogen have an oxidation number of zero?
H2
What is the IUPAC name for the compound FeS?
Iron (2) sulfide
What is the chemical formula for sodium sulfate?
Na2SO4
The chemical formula for nickel (II) bromide is
NiBr2
Which formula represents strontium phosphate?
Sr3(PO4)2
What is the formula of titanium(II) oxide?
TiO
What is the IUPAC name for the compound ZnO?
Zinc Oxide
What is the name of the polyatomic ion in the compound Na2O2?
peroxide
KCIO₃ >>> KCI(s) + O₂(g)
unbalanced 0=1+x-6 0=x-5 +5=x