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A 3.00-rm L flask is filled with gaseous ammonia, rm NH_3. The gas pressure measured at 22.0, ^{circ}C is 2.05 atm. Assuming ideal gas behavior, how many grams of ammonia are in the flask?
A dolphin in 25°C sea water emits a sound directly toward the bottom of the ocean 135 m below. How much time passes before it hears an echo? (The speed of sound in sea water is 1530 m/s.)
Chlorine, Cl2, is produced commercially by the electrolysis of aqueous sodium chloride. How long will it take to produce 1.25 kg of chlorine if the current is 5.00 102 A?
What is the molar mass of a compound that takes 1.45 times as long to effuse through a porous plug as it did for the same amount of XeF2 at the same temperature and pressure? Answer in units of g/mo
Write the acid/base equilibrium reaction (net-ionic) for the major species present in an aqueous solution of each of the following substances. use H3O+ as the acidic species
How many times faster is the speed you found in (a) than the speeds of our fastest current spacecraft (around 50,000 km/hr)?
Calculate the density, mole fraction, molarity, and molality of the solution. Assume water has a density of 1.00 g/cm3.
One cubic meter (1.0 m3) of aluminum has a mass of 2700 kg, and a cubic meter of iron has a mass of 7860 kg. Find the radius of a solid aluminum sphere that has the same mass as a solid iron sphere
Arrange CH4, Cl2, and CO2 in order of increasing strength of dispersion forces. (least to the greatest)
Calculate the equilibrium concentrations of reactants and product when 0.238 moles of CH4 and 0.238 moles of CCl4 are introduced into a 1.00 L vessel at 350 K.
If 1.87 g of acetic acid(CH3CO2H) reacts with 2.31g of isopentyl alcohol(C5H12O) to give 2.96 of isopentyl acetate(C7H14O2), what is the percent yield of the reaction?
The dipole moment () of HBr (a polar covalent molecule) is 0.784 (debye), and its percent ionic character is 11.6 . Estimate the bond length of the bond in picometers.
The velocity of the pile driver at the point of contact with the pile.
Why cost is often a major factor in choosing a limiting reactant?
A baseball pitcher throws a fastball horizontally at a speed of 155km/h toward home pplate, 17.2m away. ignore air resistance. a)if the batter's combined reaction and swing times total 0.350s, how l
An experiment shows that a 248 gas sample has a mass of 0.433 g at a pressure of 745 mm Hg and a temperature of 28 C. What is the molar mass of the gas?
Calculate at 25°C for this battery when [H2SO4] = 4.5 M, that is, [H+] = [HSO4-] = 4.5 M. At 25°C, ° = 2.04 V for the lead storage battery.
A ball on a porch rolls 60 cm to the porch's edge, drops 40 cm, continues rolling on the grass, and eventually stops 80 cm from the porch's edge. What is the magnitude of the ball's total displaceme
If the reaction rate doubles when the temperature is increased to 35 degrees C, what is the activation energy for this reaction in kJ/mol?
While visiting england you decide to take a jog. What is your displacement, average velocity, and average speed after running 2.0 km on strawberry fields and 1.0 km on penny lane?
Calculate the molarity of a solution of glycerol made by dissolving 53.000 mL glycerol at 15 'C in enough water to make 270.00 mL of solution.
Discuss in detail, one way in which atomic nuclear decay takes place. What is the significance of atomic nuclear decay? Analyze the societal implications of using this process.
Calculate the wavelength of the light emitted when an electron in a hydrogen atom makes each of the following transitions. (n=3 to n=1)
What power must a motor have to perform this task. (Answer in horse power).
A sample of water is collected over water at a total pressure of 616.8 mmHg at 300 C. The vapor pressure of water at 300 C is 31.8 mmHg. What is the partial pressure of O2?