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Use your value for the heat of neutralization,ΔH1=-158.0kJ/mol, to determine the amount of heatevolved when 20.00mL of 1.984M HNO3 reacts with 20.00mLof 2.016M NaOH.
Craw the skeletal structure, where each atom obeys theoctet/duet rule and no atom possesses a formal charge, for themolecule whose condensed structure is:
Calculate the concentration in mg/L a solution that wasprepare by adding 3.00 mL of a 3.85*10-4 stock solution of Allura redto a 50.00 mL volumetric flask and then filling to the mark with DIwater.
0.22 litre of an idealmonatomic gas (Cv = 3R/2) initially at 12 deg C and 1.7 atmpressure undergo an expansion against a constant external pressureof 1.01 atm, and do 2.3 kJ of work.
53.576 g Magnesium Sulfate di hydrate are dissolved in 250.00 mL of1.50 M Barium nitrate solution to produce BaSO4 precipitate. How many grams of barium sulfate were formed after the reaction?
If all of the atoms in a penny were to form a very thin coating on another object, a monolayer that is one atom thick with all atomstouching their neighbor atom , estimate the area(in squaremeters)
The solubility product constant for A(IO3)2is 1.55x10^-6. What volume (in mL) of 5.29x10^-2 MS2O32- would be required totitrate a 1.250x10^1 mL sample of the saturated solution ofA(IO3)2?
To determine the solubility product constant (Ksp) at 50oC forNi(IO3)2, a chemist prepares a saturated solution of the salt at this temperature.
It goes like this : "A 20.0g piece of aluminum at 0.0 degree Celsius is dropped into a beaker of water. The temperature of the water drops from 90.0 degrees Celsius to 75.0 degrees Celsius.
A jewler wishes to make solid gold cylindrical charms with a heightof 2.0cm and a radius of 5.25mm. Gold has a density of 19300kg/m3 and is $1095 per oz. The volume of a cylinder isπr2h. How much
45.0g og magnesium carbonate is added to water to prepare a 250.0mlsolution. 15.0ml of this solution has 50.0ml of water added. what is the concentration of magnesium carbonate in the second soluti
At a certain temperature 15.0 moles of nitrogen gas and7.00 moles of hydrogen gas are placed in a 20.0 L glass vessel.When equilibrium is reached, 3.00 moles of ammonia gas arefound.
Are the interactive forces between propanol and watermolecules weaker than, stronger than, or equal to the interactive forces between the pure substance? Explain.
A sample of benzene,C6H6, which contains a total of 5.50 mol of carbon Calculate the number of molecules present in each of the following samples.
A He+ ion emitts a photon with a frequency of 2.76× 1015 Hz. If the energy of the initial state ofthe He+ ion was -3.49 × 10(-19) J,calculate the energy of the final state. Express answ
You have two flasks of equal volume. Flask A contains H2at 0°C and 1 atm pressure. Flask B contains CO2 gasat 0°C and 2 atm pressure. Compare these two gases with respectto each of the follo
Assume that you have 1,2,5,and 10 ml pipets and a 25mlvolumetric flask. Describe in detail how you would prepare asolution with a concentration near 0.10 M from a 0.650 M stocksolution.
A flask of volume 9.1 liters contains 5.0g of hydrogen, 0.55moles of oxygen, and sufficient argon so that the partial pressureof argon is 2.20 atm. The temperature is 136 c.
If the pure vapor pressures of benzene(C6H6) and toluene(C7H8) are Pben=94.6 torr andPtot= 29.1 torr, what are the mole fractions of benzeneand toluene xben and xtol in both the liquidand vapor phas
Calculate the volume of methane, CH4, measured at 300. Kand 1.09 atm, that can be produced through the bacterialdecomposition of 1000 g ofC6H12O6.
Calculate the density of iron Fe given that the melatllic radius isrFe= 1.24 Angstrom and that Fe displays a body centeredcubic unit cell.
Firstly, In order to perturb the structure of protein J,you can make any substitution you wish for aa21 ( the 21st aminoacid residue from the NH2 terminal), which is Lys.
Calculate the # of molecules of N2, ofO2, and of Ar in 1.00 L of air at 21 ºC and 1.00atm. Calculate the mole fractions of N2,O2, and Ar in the air.
To a sol containing 2.00g of CaCl2 & RbCl we add an excess of AgNO3 to form 3.45 gof AgCl(s) precipitate. What is the % of RbCl in theoriginal mixture.
If a cube with edges of 1.000 cm weighs 25.68 g, what would themass of a cube of the same material with sides 2.57 cm in length be?