5. Assign oxidation numbers to substances in the three-step production of sulfuric acid to show which reactions are redox and which are not.
S (s) + O2 (g) – SO2 (g)
SO2 (g) + O2 (g) – SO3 (g)
SO3 (g) + H2O (1) - H2SO4 (1)

Which terms are used to identify pure substances

What is a difference between a mixture of elements and a mixture of compounds

Bridget is in science class. her teacher gives her two unknown substances and asks her to determine their relative ph. she places a piece of red litmus paper into both substances. the litmus paper turns purple when she places it into substance i. the litmus paper turns blue when she places it into substance ii. a. substance i is a neutral substance and substance ii is an acid. b. substance i is a neutral substance and substance ii is a base. c. substance i is an acid and substance ii is a base. d. substance i is a base and substance ii is a neutral substance.