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Using the standard entropy values: NO(g), S° = +210.6 J mol-1 K-1 O2(g), S° = +205.0 J mol-1 K-1 NO2(g), S° = +240.5 J mol-1 K-1 calculate the standard entropy change, DeltaS°, for the reaction: NO(g) + ½ O2(g) ® NO2(g): 1) - 72.6 kJ 2) -175.1 kJ 3) -246.1 kJ 4) +246.1 kJ 5) -656.1 kJ
what is the percent yield of a reaction in which 266 g phosphorus trichloride reacts with excess water to form 134 g
HCl + NaOH = NaCl + H2O If 200 mL of a .20 M HCl solution is consumed in the above reaction, how many grams of each product would be produced.
Find the average value of the electron-nucleus seperationin a hydrogen like atom in the 2pz (ml=0) state.
A stream of humid air containing 1.00 mole % H2O(v) and the balance dry air is to be humidified to a water content of 10.0 mole % H2O. For this purpose
A student combusts 504.96 grams of ethene gas, C2H4. How many liters of CO2 (g) are produced at a pressure of 0.993 atm and a temperature of 295 K? C2H4 (g) + 3 O2 (g) ->2 CO2 (g) + 2 H2O (g)
The specific rotation of the pure R-enantiomer of a compund is +80 degrees. What is the composition of R- and S-enantiomers in a mixture
From the number if moles of ammonia calculated in part (a - below) determine the number of micrograms of mitrogen per gram of dry soil. Assum you have 2.753 f of soil and all of the ammonia diffused from the soil.
Assume your solution contains lead and iron but not silver or nickel. Explain how will you know that: - Either silver or lead is present ( that is, describe what you will see that will tell you at least one of these is there)
What is the concentration of g salt per 100 g water of a saturated solution in which 3.82 g of salt are dissolved in 9.54 g of water?
Draw the product for the chlorination of 2-methylbutane that proceeded through a secondary radical.
A 29.0-g sample of water at 260. K is mixed with 51.0 g water at 310. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
If the volume of ocean water 5.4*10^20) contains 4.1 percent sodium chloride ("salt") by mass and the density of the water is 1.86 g/mL, calculate the total mass of sodium chloride.
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