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Calculate the enthalpy of the reaction: 2NO(g) + O2(g) --> 2NO2(g) given the following reactions and enthalpies of formation:
Hypofluorous acid, HOF, is very unstable, decomposing in a first-order reaction to give HF and O2, with a half-life of 30. minutes at room temperature: HOF(g) ! HF(g) + 1⁄2 O2(g) If the partia
Water has vapor pressure of 23.8 torr at 25 degrees celsius. Find vapor pressure of water at 40 degrees celsius if delta H of vaporization is 40.7 KJ/mol.
In the Grignard synthesis of Benzoic Acid, what is the weight of frost (ice) on the dry ice that will react with all of the phenyl Grignard reagent resulting in the production of no benzoic acid?
In order to prepare standard solution of EDTA, pure disodium EDTA dihydrate can be used as a primary standard. How much Na2EDTA x 2 H2O must be weighed to prepare exactly 2 L of 0.0500 M solution? F
How much energy in kilojoules is required to convert 100 mL of diethyl ether at its boiling point from liquid to vapor if its density is 0.7138 g/mL?
Which is the correct mathematical expression for the molar solubility (x) in mol/L of Fe3(PO4)2?
The following volumes were pipetted into reaction flasks and mixed: 10.0 mL 0.0100 M KI, 10.0 mL 0.00100 M Na2S2O3, 20.0 mL 0.0400 M KBrO3, and 10.0 mL 0.100 M HCl. The mixture turned blue in 66.5
What mass in grams of tryptophan is in 0.25 quart of milk, assuming tryptophan accounts for 2.0% of milk by mass and that the density of milk is 1.04 kg/L?
A strong acid is generally used to catalyze the Fischer esterification of carboxylic acids. What two steps in the reaction are accelerated by the presence of strong acid, and what function does the
Calculate the percentage of chlorine in a sodium hypochlorite powder (disinfectant for pools) if 5.0 kg of powder gives off 2.3 kg of chlorine.
What is the magnitude of the apparent weight of a 83 kg astronaut 5200 km from the center of the Earth's Moon in a space vehicle moving at constant velocity?
A sample of nitrogen gas, N2 is collecyed in a 100 mL container at a pressure of 688 mm Hg and a temperature of 565 degress celsius. How many grams of nitrogen gas are present in this sample.
When pure carbon burns in air, 10.0 kg of carbon react with the oxygen in the air to form 36.7 kg of carbon dioxide. Calculate the percentage of oxygen contained in carbon dioxide.
Describe how you would separate a mixture containing benzoic acid and a neutral substance, benzophenone. Both compounds are insoluble in water and soluble in ether.
A car starts from rest and travels for 5.0 s with a uniform acceleration of +1.5m/s2. the driver then applies the brakes, causing a uniform acceleration of -2.1 m/s2. if the brakes are applied for 3
Water bubbles up through a hot spring at Yellowstone national park. What method of heat transfer is this?
100 tons of hard lead (98%Pb, 2%Sb) are melted in a steel kettle and then treated with 2 tons of PbO. The products are (1) a slag consisting of PbO and Sb2O3, analyzing 20%Sb, (2) a Pb- Sb alloy of
What is the theoretical yield of carbon dioxide when 56.0 g of methane is burned in a excess of oxygen, according to the equation CH4 2 )2 arrow CO2 2 H2o
Consider the reaction of 5.0 moles of CS2 and 3.0 moles of NaOH according to the following reaction. Calculate the number of moles of Na2CS3, which will be produced after the reaction is completed
Two packing crates of masses m1 = 10.0 kg and m2 = 5.50 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 5.50 kg crate lies on a smooth incline o
The longest recorded pass in an NFL game traveled 81 yards in the air from the quarterback to the receiver.Assuming that the pass was thrown at the optimal 45 angle, what was the speed at which the
When NaHCO3 is heated above 270 degrees Celsius, it decomposes to Na2CO2, H2O, and CO2. Calculate mass of CO2 produced from the decomposition of 59.0g of NaHCO3.
A copper-bottomed kettle, its bottom 24 in diameter and 3.0 thick, sits on a burner. The kettle holds boiling water, and energy flows into the water from the kettle bottom at 800. What is the tempe
The following quantities of these trace gases were found in a 1.0 gallon sample of air. Calculate number of moles of each gas in the sample: