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Why is the electron in a Bohr hydrogen atom bound less tightly when it has a quantum number of 3 than when it has a quantum number of 1?
when sodium azide , NaN3 , is activated in an automobile air bag , nitrogen gas and solid sodium are produced . if 0.0500 moles of NaN3 react , what mass , in grams , of nitrogen would result ?
A gas mixture with a total pressure of 765 contains each of the following gases at the indicated partial pressures: , 118 ; , 229 ; and , 187 . The mixture also contains helium gas. What is the partial pressure of helium gas.
Problem- Ub tge titration of 25.0 mL of 0.1 Fe2+ with 0.100 MCe4+, what will be the cell potential after the addition of 25.0 mL of Ce4+ solution
If 0.130 mol a third gas is added with no change in volume or temperature, what will the total pressure become?
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 20.0 g of luminol to rm H_2O creating a solution with a total volume of 75.0 rm mL.
What would be the effect on the pH of adding 10 mL of 2 M sodium hydroxide to the original buffer. What would be the effect on the pH of adding 100 mL of 2 M sodium hydroxide to the original buffer
Problem- Consider the exothermic combustion of coal. Which of the following could increase the rate of reaction?
a line in the emission spectrum of an atom occurs at a wavelength of 560 nm. what is the energy difference between the
Determination of the equilibrium constant for the iodine + iodide →triiodide reaction as a function of concentration. Calculate the concentrations of iodine ([I2 ]0) and iodide ([I-]0) that would result from the dilutions if a reaction did not occ..
How do the conformational changes during kinase activation enable imatinib to distinguish between Abl and the hundreds of other related kinases in the cell?
Caffeine has a distrubution coefficient of 8.4 for methylene chloride/ water. How much caffiene will be extracted from a 200 mL cup of Turkish coffee (250 mg caffeiene) by 100 mL of methylene chloride?
An automobile gasoline tank holds 36 kg of gasoline. When the gasoline burns, 95 kg of oxygen is consumed, and carbon dioxide and water are produced.
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