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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:
The jewelry contains only gold and silver, which have densities of 19.3 g/cm3 and 10.5 g/cm3, respectively. If the total volume of the jewelry is the sum of the volumes of the gold and silver that i
Two of the chemist will report, within experimental error, the same temperature change for the HCL/NaOH reaction. Identify the two students and explain.
Calculate the entropy change when argon at 25 °C and 1.00 bar in a container of volume 0.500 dm3 is allowed to expand to 1.000 dm3 and is simultaneously heated to 100 °C.
What problems and dangerous situations can result from their improper storage and use (i.e., mixing them together, etc.)? What government agency and regulation(s) account for the labeling and regist
A furniture store needs 31.5 ft 2 of fabric to upholster one chair. Its Dutch supplier sends the fabric in bolts of exactly 200m2 . What is the maximum number of chairs
In the procedure for brominating (E)-stilbene that involves in situ generation of bromine, what is the solid that appears when the concentrated hydrogen bromide is added?
Calculate the theoretical yield of C2H5Cl when 138 g of C2H6 reacts with 244 g of Cl2, assuming that C2H6 and Cl2 react only to form C2H5Cl and HCl.
Write an equations for the reactions that takes place when the compound in ch3ococh2ch3 is refluxed in the presence of aqueous sodium hydroxide
A solution of 116 mL of 0.170 M KOH is mixed with a solution of 230 mL of 0.240 M NiSO4. What precipitate forms?
The pressure in a sealed plastic container is 108 kPa at 41C. What is the pressure when the temperature drops to 22C? Assume that the volume has not changed.
If B gas at 0.221 bar is injected into a container at 665 °C that contains excess A, what are the partial pressures of all gases present at equilibrium?
An aqueous solution is 48.3% by mass hydroiodic acid, HI. The density of this solution is 1.6 g/ml at 20 C. How many grams of pure HI are there in 190.0 ml of this solution at 20.0 C?
Find the enthalpy change for the chemical reaction below PCl5(g) ----> PCl3 (g) +Cl2 From the following equations: P4 (s) + 6Cl2(g) ----> 4PCl3(g) DeltaH = -2439 kJ 4PCl3(g) ----> P4 +10Cl
A reaction mixture initially contains a Br2 partial pressure of 755 torr and a Cl2 partial pressure of 725 torr at 150 K. Calculate the equilibrium partial pressure of BrCl.
In an experiment, a student gently heated a hydrated copper compound to remove the water of hydration. The following data was recorded:
2NO+O2 makes NO2, what mass of NO2 is formed when NO reacts with 384g O2?, how many grams of NO are required to react with this amount of O2?
A solution of sulphide (Ct = 10-6 M) is blended into a 0.4 M sodium chloride solution in a closed container. Plot a log C-pH diagram for the system, including activity coefficients in the construct
In Europe, gasoline efficiency is measured in rm km/L. If your car's gas mileage is 23.0 mi/gal, how many liters of gasoline would you need to buy to complete a 142-rm km trip in Europe?
How does the Hammond's postulate explain? a. the greater selectivity for bromination vs. chlorination of an alkane?
Elemental exonium (not a real element) con- sists of two major isotopes Abundance Mass 55% 98 amu 45% 114 amu What is the atomic weight for exonium? Answer in units of amu#question..
A stock solution is prepared by adding 21 mL of 1 M AlCl3 to enough water to make 76 mL. What is the Cl- concentration of 40 mL of the stock solution?
At 80*C the vapor pressures of pure liquids X, Y, and Z are 385, 190, and 68 mmHg respectively. What pressure must be exerted on the surface of a solution containing one mole of X, three moles of Y,
How does the mechanism you proposed in Part a support the formation of the racemic form of a single diastereomer?