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1. Calculate the work (in kJ) when 3.00 moles of hydrogen gas are produced from the reaction of sodium in excess water at 298 K:
2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
2. Calculate w (in kJ) when 379 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 429 K:
2Fe2O3(s) + 3C(s) → 4Fe(s) + 3CO2(g)
3. Calculate the work (in kJ) when 2.60 moles of methane react with excess oxygen at 494 K:
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)
4. A reaction at 3.04 atm consumes 1.20 L of a gas. Calculate the change in internal energy of the system (in kJ).
5. A reaction at 1.76 atm produces 22.8 L of a gas and evolves 71.0 kJ of heat (exothermic). Calculate the change in internal energy of the system (in kJ).
A solution is made by dissolving 0.040 moles of the weak acid HA in water to make 1.00 L of a solution whose pH is 4.90. Calculate the Ka for the acid.
What is the pE value in an acid mine water sample having [Fe3+] = 6.79E-3 M and [Fe2+] = 4.14E-4 M?
If the solution has a specific heat capacity of 3.95 J/(g K) and a density of 1.015 g/ml, what is the DeltaH for the following reaction in kJ?
which of the following solutes dissolved in 1000 g of h20 would provide a solution with the lowest freezing pts?
A chemical firm was hired to monitor a nearby lake for possible mercury contamination. Several samples were taken at different locations around the lake, including water samples.
When 0.047 moles of ammonium sulfate are dissolved in enough water to make 413 milliliters of solution, how many ammonium ions are present?
Write a complete stepwise mechanism for the reaction of cyclopentanone with bromine in acetic acid to give 2-bromocyclopentanone. Show all intermediate structures and all electron flow with arrows.
Chemical reactions are typically faster when a catalyst is added. This is because... 1. Molecules are moving faster when a catalyst is added
Suflur dioxide may be catalytically oxidized to sulfur trioxide. How many grams of sulfur dioxide could be converted by this process if 100.0 grams of oxygen are available for the oxidation?
If 49.0g of H3PO4 is reacted with excess KOH, determine the percent yield of K3PO4, if you isolate 49.0g of K3PO3.
Identify the alkaline Earth metal. Express your answer as a chemical formula. Write the formula for the metal hydride. Express your answer as a chemical formula.
What is the mass percent of NaCl in a solution obtained by mixing 50g of this solution with 215g of H2O?
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