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Consider the electronic transition from n = 4 to n = 1 in a hydrogen atom, and select the correct statement below.
A. A photon of 97 nm wavelength and 2.05x10-18 J energy was emitted from the hydrogen atom in this electronic transition.B. A photon of 97 nm wavelength and 2.05x10-18 J energy was absorbed by the hydrogen atom in this electronic transition.C. A photon of 122 nm wavelength and 1.64x10-18 J energy was emitted from the hydrogen atom in this electronic transition.D. A photon of 122 nm wavelength and 1.64x10-18 J energy was absorbed by the hydrogen atom in this electronic transition.
How much heat can be obtained by burning 14 pounds of propane? (Remember to look at this from the viewpoint of the surroundings, since the question asks how much heat can be OBTAINED.)
Consider the following thermochemical equations : 8Mg(s) + Mg(NO3)2(s) ? Mg3N2(s) + 6MgO(s) ?H°rxn = -3884 kJ Mg3N2(s) ? 3Mg(s) + N2(g) ?H°rxn = +463 kJ 2MgO(s) ? 2Mg(s) + O2(g) ?H°rxn = +1203 kJ Use the above equations to calculate the ?H°f (in k..
Chlorides are at the corners of a primitive cube with a cesium in the middle. Using the Cs atom as the origin calculate the first three terms of the Madelung constant for a CsCl crystal. Recall that M is cal calculated in terms of the ionic "bond ..
What is the function of a chemical indicator. (is the answer the function is to determine if a sample solution is a base or an acid?) Why is water considered neutral
As a solid, Ag adopts a face-centered cubic unit cell. How many unit cells are present per cubic centimeter of Ag
The rate constant of the reaction A ? B + C is 2.75 x 10-7 s-1 at a certain temperature. The initial [A] is 2.19 M. How many days would pass before A had decomposed to the extent that 0.601 M of A remained?
Why is lactose much more soluble in water than in ethanol?
Bond length is the distance between the centers of two bonded atoms. On the potential energy curve, the bond length is the internuclear distance between the two atoms when the potential energy of the system reaches its lowest value.
When a 3.03x102 g strip of zinc is dropped into a large beaker containing excess hydrochloric acid, how many grams of gas are formed?
A sample of H2O with a mass of 46.0 grams has a temperature of -58.0C. How many joules of energy are necessary to melt 46.0 grams of ice.
Determine what the mothballs were made of. Pure ethyl alcohol has a boiling point of 78.41 degrees C and Kb = 1.22 deg C/m for this solvent.
It is found that 4.68e-06 g of Nd2(CO3)3 dissolves per 100 mL of aqueous solution at 25 oC. Calculate the solubility-product constant for Nd2(CO3)3
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