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What type of intermolecular forces accounts for Kr, atomica weight 84, boils at 120.9k
When a sample of aqueous hydrochloric acid was neutralized with aqueous sodium hydroxide in a calorimeter, the temperature of 100.0 g of water surrounding the reaction increased from 25.0°C to 3
Salicylic acid reacts with acetic anhydride to produce acetylsalicylic acid and acetic acid (1:1:1:1). Write the balanced chemical reaction using structural formulas.
Calculate the energy change for the reaction given the following ionization (IE) energy and electron (EA) affinity values. K: IE- 419kJ/mol and EA-48 Kj/mol and Br: IE-1,010 kJ/mol and EA 295 kJ/mo
Write a balanced molecular equation for MnSO4xH2O reacting with H2C2O4 and water to form MnC2O4x3H2O. What will be the other products of the reaction?
Calculate the final concentration of a sodium hydroxide solution prepared by adding 10.00mL of 5.325M sodium hydroxide stock solution into a 250.00mL volumetric flask and then filling to the mark wi
What is the boiling point of cyclohexane at 600 mmHg
What are the absolute and percent uncertainties in the perimeter, area and volume of the tetrahedron?
Predict the sign of delta S for each of the following reactions:
If the pressure exerted on the gas in a weather balloon dereases from 1.05 atm to 0.573 atm as it rises, by what factor will the volume of the gas in the balloon increase as it rises?
Calculate the amount of heat required to completely sublime 88.0 g of solid dry ice CO2 at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol.
2.00 x10^2 mL of .744 M HCl is mixed with 2.00 x 10^2 mL of .372 M Ba(OH)2. how many moles of water are produced in the reaction
Using the values for the mass of p-dichlorobenzene, its molar mass (147.01 g/mol), and the mass of cyclohexane solvent that you used, calculate and enter the molality of the p-dichlorobenzene soluti
if a 210 mg piece of gold (density=19.32 b/cm^3) is hammered into a sheep measuring 2.3*10 ft. what is the average thickness of the sheet in meters?
Calculate the total pressure (in atm) of a mixture of 0.0270 mol of helium, He, and 0.0200 mol of oxygen, O2, in a 4-L flask at 20°C. Assume ideal gas behavior.
Sodium vapor lamps, used for public lighting, emit yellow light of wavelength 580 nm. How much energy is emitted by an excited sodium atom when it generates a photon? Answer in units of J.
A 1.80-g sample of a large biomolecule was dissolved in 21.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecu
Calculate the weight of potassium chlorate required to prepare 380mL of wet oxygen collected over water at 20degrees celsius and 750mm of Hg.
At 760 K, 15% of a sample of cyclopropane changes to propene in 6.8 min. What is the half-life of cyclopropane at 760 K?
A metal object with a mass of 19g is heated to 96 degree celcious, then transferred to acalorimeter containing 75g of water at 18 degree celcious. Tjhe water and objectmreach a final temperature at
Use standard reduction potentials (shown below) to calculate the potential of a nickel-cadmium cell that uses a basic electrolyte that has a 0.6 M hydroxide concentration.
A 255-mL flask contains pure helium at a pressure of 745 torr. A second flask with a volume of 455 mL contains pure argon at a pressure of 725 torr. If the two flasks are connected through a stopcoc
how high (in meters) can the person climb based on this energy intake? [Hint: The work done in ascending is given by mgh, where m is the mass (in kilograms), g the gravitational acceleration (9.8 m/
How many mL of 0.385 M perchloric acid would have to be added to 150 mL of this solution in order to prepare a buffer with a pH of 10.800.