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Which has greater electronegativity? Oxygen, or Hydrogen?

UCBA has computers (loaner laptops and on-site computers) that students may use to take exams. UCBA also has reliable WiFi and quiet places where students can take exams.   Please select the answer that best applies to you.

What is the concentration (in M) of iodide ions when 0.200 moles of FeI3 is dissolved in 725 mL of water?

231 mL of water is added to 19 mL of 7.0 M AgNO3 What is the concentration, in M, of the resulting solution? Hint:  Vwater = V2 (final volume) – V1 (initial volume)

A system performs 111 kJ of work on its surroundings and gains 89 kJ of heat. What is the value of ΔE (in kJ) for the system?

46 mL of water is added to 204 mL of 7.0 M AgNO3 What is the concentration, in M, of the resulting solution? Hint:  Vwater = V2 (final volume) – V1 (initial volume)

Consider an unknown metal sample that weighs 10.0 g. If the unknown metal absorbs 309 J of energy to heat up from 10.0°C to 27.0°C, what is the most likely identity of the metal?  

What is the oxidation number for the chlorine atom in the compound, potassium chlorate, KClO3?

Three separate 3.5 g blocks of Sn, Hg and Cr are heated from 25°C is heated to 75°C. Which block requires absorbtion of the most amount of heat (q) to reach the final temperature?  

Consider the reaction below: H2S (g) + Cl2 (g) → S (s) + 2 HCl (g) The element                   is undergoing reduction and                     is the reducing agent.