In which of the following species does sulfur have the lowest oxidation number? A) S2™ B) Sa C) SO3² D) SO42 E) S₂O3²

Hydrogen peroxide can decompose according to the following equation.                       2 H2O2 (l) → 2 H2O (l) + O2 (g)               DrH, = –98.2 kJ mol–1   Choose the correct statement regarding this reaction. Select one: a. None is correct b. This reaction is disproportionation c. This reaction is endothermic d. This reaction is comproportionation

Match each reaction or description to the change in entropy. CaCl₂ (s) + H₂O(l) CaO(s) + 2 HCl(g) Raindrops form in a cloud freezing water to form ice Frost forms on the windshield of your car Air is pumped into a tire CO₂(g) + H₂O(l) ----> H₂CO3(aq) | SOz(g) + CaO(s) -----> CaSO3(s) Ba2+ (aq) + 2F (aq) 2HgO (s) C₂H4(g) + H₂(g) ---> C₂H6 (g) boiling water to form steam dissolution of solid KCl in water PCL 3 (g) + Cl₂(g) PCL5(g) Sugar dissolves in coffee 2NO₂ (g) --> N₂O4 (g) BaF₂ (s) --> |2Hg (1) + O₂ (g) ---> --> ----> Gasoline vaporizes in the carburetor of an automobile engine Moisture condenses on the outside of a cold glass melting ice to form water mixing of two gases into one container seperating solute particles throughout a solvent Ni (s) + 2 HCl(aq) H₂(g) + NiCl₂(aq) a. As0

Consider the series of reactions to synthesize the alum (KAl(SO4 )2 · xH2O(s)) Assuming an excess of the other reagents, from one mole of aluminum Al (s), how many moles of alum will be produced?

What are the oxidation numbers of Sr(BrO3)2 Sr: Br O

2 V2O5 + 5 Si → 4 V + 5 SiO2Given the above balanced equation, calculate the number of grams of silicon required to prepare 420 grams of vanadium metal.Your answer should have 3 sig figs.