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Calculate the wavelength of a photon in nm emitted by a hydrogen atom when its electron drops from the n=5 state to the n=3 state
Draw all of the resonance forms of 4-nitrobenzaldehyde which contribute to the enhanced electrophilicity of the aldehyde carbon relative to benzaldehyde
If 4.50 moles of ethane, C2H6 undergo combustion,according to the unbalanced equation C2H6+O2--> CO2+H2O, how many moles of oxygen are required?
When 0.154g of sulfur is finely ground and melted with 4.38g of camphor, the freezing point of the camphor is lowered by 5.47 degrees Celsius. What is the molecular weight of sulfur and What is its molecular formula
Give the balanced equation for the reaction- exothermic formation of 1 mol of sodium chloride from its elements
A a student started with a mixture weighing 1.356 gm. The student recovered 1.543 g . Assuming that all calculations were done correctly what was the most likely source of error in the experiment
Butane C4H10, is a component of natural gas that is used for cigarette lighters. The balanced equation of the complete combustion of butane is
Suppose that a 4.0 L sample of gas at 1.0 atm is heated from 44°C to 53°C, during this process the volume doubles. What will the final pressure of the gas sample be
A gas has a volume of 2.84 L at 1.00 atm and 0oC. At what temperature does it have a volume of 7.50 L at 520 mmHg
We use Use the De Broglie wavelength formula, ohr radius definition and wave-particle duality equation to compute the wavelength of,
What is the pressure (in atmospheres) of a sample of gas trapped in the closed-tube mercury manometer
A certain solvent has a normal freezing point of 1.72 ° C, and a freezing point depression constant of 5.07 ° C/m. What is the molality of a solution in
The solubility of silver chromate, which has a Ksp equal to 9.0e-12 at 25 degrees celsius, is determined in water and in two different solutions. Predict the relative solubility of silver chromate in the three solutions
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