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Determine the numbers of photons at 660 nm must be absorbed to melt 5.0 x 102 g of ice? (Hint: It takes 334 J to melt 1 g of ice at 0°C.) Describes in details.
Explain why is it possible to separate some compounds with identical boiling points by gas chromatography even though at all by distillation they cannot be separated, even fractional distillation?
Determine the numbers of photons of red light are needed when the human eye is a complex sensing device for visible light. The optic nerve needs a minimum of 2.0*10^-17 J of energy to trigger a seri
Determine the wavelength in nanometers of the light absorbed by a hydrogen atom to cause the "ultimate" quantum jump or electron transition from n=1 to n=infinity.
When thermal equilibrium is reached, all of the ice will have melted and the temperature of the mixture will be somewhere in between 0 degrees C and 20 degrees C.
What is the pH at the stoichiometric point for the titration when a 16.20-mL sample of sodium hydroxide solution is titrated to the stoichiometric point with the 18.60 mL of a 0.262 M solution of H
Calculate the partial pressure of NO(g) at the equilibrium if 0.0500 mol NO and 0.0300 mol N2(g) are introduced into an 8.00 L container at 2500 K? The value of Kp at 2500 K is 0.0500.
When 4.50 g of this compound is added to 300.0 mL of water, the temperature rises from 18.3°C to 25.8°C. A Styrofoam cup calorimeter is used to calculate the heat of reaction for the dissolu
Calculate the number of unpaired electrons in an octahedral, high-spin cobalt (III) complex ion. Describe the energy of the electronic transition? The wavelength of maximum absorption of Cu(NH3)42+&nb
Determine the theoretical yield of N2 and Co2 and H2o andO2 if you start with 200 grams of C3H5N3O9. Determine the percent yield in this reaction if the amount of O2 generated is found to be 6.55 gram
Describe the partial pressure of NH3 when a mixture of 6.02 x 1023 molecules NH3(g) and3.01 x 1023 molecules H2O(g) has a total pressure of 6.00 atm.
Determine the product of 2Rb(s) + I2(g)? Which is reduced and which element is oxidized? Could you also explain how this is found?
Explain what type of orbital is occupied by an electron with the quantum numbers n = 3, l = 2? Calculate the total number of sub shells associated with the n= 5 level?
What is the Ksp of lead(II) sulfate when a saturated solution of lead(II) sulfate can be prepared by diluting the 0.0101 g of PbSO4 to 250 mL.
Determine the numbers of hydrogens does diazepam have? Diazepam, marketed as an ant anxiety medication under the name Valium, has three rings, eight double bonds, and the formulaC16H? ClN2O.
What equation would you use to calculate the volume of the stock solution needed to prepare a solution that has a concentration that is less than 20% (v/v) (like 15% for example) in a 10mL fla
Determine the numbers of grams of water at the 100oC can you boil if you add550 kilojoules to the water? The heat of vaporization for water is 40.8 kJ per mole of water.
If the wave -length of microwaves in the oven is 9.75 cm, discuss how long does it take and determine the numbers of photons must be absorbed to make the water boil? Suppose only the water abs
Determine the temperature of a sample of carbon dioxide gas with a density of 1.48 g/L and a pressure of 708 torr.
Determine the numbers of moles of gas would need to be added to the container at the constant temperature to increase the pressure from 1.00 atm to 1.80atm? A rigid container holds 3.00 moles of an
If the specific heat capacity of nickel is 0.444J/oCg what mass of nickel was originally heated? Assume no heat loss to the surroundings. A sample of nickel is heated to 99.8oC and placed in a coffee-
Determine the mass of iron(II) ammonium sulfate hexahydrate (FeSO4 (NH4)2SO46H2O) needed to make the100 mL of 0.0500 mol/Lsolution
Determine the maximum amount of sodium sulfate that can be added to the 1.00 L of 0.0020 M Ca(NO3)2 before precipitation of calcium sulfate begins? Ksp =2.4 × 10-5
Calculate the percent by volume of the solution when a student dissolves 1.322 grams of a solute in water. The volume of the solution is 10.18mL.
If the heat capacity of the calorimeter and contents was 12.05kJ/oC, determine the value of q for burning 1.25 moles of benzene at the constant volume and 25.00oC? A sample of benzene, C6H6 weigh