What are the oxidation numbers of the following: (a) C in CH2O (b) C in CO2 (c) C in CH4 (d) C in C6H6

1) Give oxidation numbers for the underlined element in each of the folle molecules or ions. (a) C4H§O4: (b) Fe3O4: (c) VO2*: (d)SnBr4: (e) PH4: (f) Ce2(SO4)3:

Determine the oxidation states of the elements in the compounds listed. None of the oxygen-containing compounds are peroxides or superoxides.(a) H3PO4(b) Al(OH)3(c) SeO2(d) KNO2(e) In2S3(f) P4O6

You wish to determine the concentration of your sulfurous acid. You titrate 27 mL of your acid with 506 mL of 0.23 M aluminum hydroxide. What is the concentration of your sample of sulfurous acid?  (A) 0.6 M (B) 0.3 M  (C) 0.64 M (D) 0.28 M

A solution of Mg(NO3)2 is prepared in 425 mL of water by adding 32.0 g Mg(NO3)2. What us the concentration of nitrate ion (NO3-) in this solution? (a) 0.216 M (b) 0.432 M (c) 0.508 M (d) 1.02 M

Which one of the following substances in aqueous solution is the strongest electrolyte?    (a)  Vinegar     (b)  Glucose      (c)  NaCl        (d)  C2H5OH (Ethanol)

9. Which of the following solutions has the highest total concentration of ions? Explain how you got your answer. (a) 0.012 M Al2(SO4)3 (b) 0.030 M KCl (c) 0.020 M Al(NO3)3 (d) 0.025 M K2SO4

5. What is the concentration of calcium ions in 350. mL of an aqueous solution containing 7.50 g CaCl2 ? (A) 0.0676 M (B) 0.193 M (C) 0.284 M (D) 0.535 M

a) Explain how youwould prepare 1.0 L of a 1.3M NaCl(aq) solution.(b) How many grams ofsodium sulfate are required tomake 500 mL of a solutionwhich is 0.80 M in sodiumion?

(A) How would you determine the grams of calcium chloride needed to make a chloride ion concentration of 0.75. Describe all steps of calculation. (B) describe the difference between the oxidizing agent and reducing agent, how would determine/identity each in a typical combustion reaction.