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One of the electrons falls from an outside orbit to an inside orbit giving off red light with a wavelength of 7.34 x 10-7 m. Calculate the frequency of the red light given off by the neon atom.
25.64 g of copper sulfate pentahydrate and 12.69 g of sodium phosphate are added to 1.000 L of water.
Assume that the kinetic energy of a 1300 kg car moving at 120. km/h could be converted entirely into heat. What amount of water could be heated from 20.°C to 51°C by the car's energy?
A solution is prepared by dissolving 19.9 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 15.00 mL sample of this stock solution is added to 59.00 mL of water. Calculate the
a bicycle tire is filled with air to a pressure of 75 psi at a temperature of 19 degrees celcius. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58 degrees celcius.
Which of the reagents is the limiting reagent? what is the maximum amount of each product that can be formed? 3CaCo3 + 2FePO4 Ca3(PO4)2+Fe2(cO3)3 assuming we start with 100 grams of Calcium carbona
The distance from the center of the bar magnet to the center of the compass is 22 cm. A steady current of 0.937 amperes runs through the coil. Conventional current runs clockwise in the coil when vi
A gaseous compound is 30.4 % N and 69.6% O. A 5.25 g sample of the gas occupies a volume of 1.00 L and exerts a pressure of 958 mm of Hg at - 4.0 C. Which of the following is its molecular formula?
If a gas has a volume of 211 mL at 780 mmHg and 370 K, at what kelvin temperature would the volume be 803 mL, assuming constant pressure?
Write a nuclear equation that describes the beta decay of hydrogen-3
When it has climbed to an altitude where the pressure is 89 mmHg and the temperature is 0 degrees celsius, what is the volume?
The energy diagram shown represents the chemical reaction between solid ammonium chloride and solid barium hydroxide octahydrate: The delta H for this reaction is 54.8 . How much energy would be abs
Assume that sodium atoms are regularly spaced (sodium, with atomic weight 23, has a mass density of 0.97g/cm^3) and that the photoelectrons are uniformly supplied by the top 10 layers of atoms. Find
If 158 mL of wet H2 is collected over water at 24 degree celsius and a barometric pressure of 737 torr , how many grams of Zn have been consumed? (The vapor pressure of water is 22.38 torr.
Write the equilibrium constant expression KP for the following reaction. C(s) + CO2(g) + 2 Cl2(g) equilibrium reaction arrow 2 COCl2(g)
We wish to dilute some 18.4 M H2SO4 solution to make 600 mL of a 0.1 M H2SO4 solution. How much of the 18.4 M solution should we start with?
Calculate the pH of the cathode compartment solution if the cell emf at 298K is measured to be 0.660. Calculate the of the cathode compartment solution if the cell emf at 298 is measured to be 0.660
A buffer was prepared by mixing 1.0 mole of ammonia and 1.0 mole of ammonium chloride to form an aqueous solution with a total volume of 1.00 liter. To 200 mL of this solution was added 20.0 mL of 1
An electron enters a uniform magnetic field with magnitude 0.2 T at a 45 angle to . Determine the radius and pitch (distance between loops) of the electron's helical path, assuming its speed is 5 m/
If this planet has the same density as Neptune (1.76 ), what is its radius expressed in kilometers? What is its radius expressed as a multiple of earth's radius?
If the reaction reaches 92.0% of completion (92.0% of the limiting reactant is consumed), what are the partial pressures of each of the reactants in the flask at 275 {rm K}?
At 25oC, the acid dissociation constant for hypochlorous acid HOCl is 3.5E-8. Calculate the concentration of the hydronium ion in an aqueous solution of 0.30M HOCl.
What are the oxidation numbers for 2FeO(s) + NaIO4(aq) + 3H2O(l) -> 2Fe(OH)3(s) + NaIO3(aq)
A 100.0 g copper sample (specific heat = 0.385 J/goC) at 100.0oC is added to 50.0 g water at 26.5oC. What is the final temperature of the copper-water mixture?