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express the velocity of the electron in the Bohr model for fundamental constants, the nuclear charge Z, and the quantum number n. Evaluate the velocity of an electron in the ground states of He+ ion
Why does K + N2 yield no reaction. could some one please explain what factors contribute to no reaction
the energy carried away by one mole of potassium is 295KJmol^-1. What is the wavelength of a single photon? What is the color of this light emitted
How can you calculate the quantitative precipitation of barium in a solid mixture of sodium chloride and barium chloride
Critically evaluate the procedure used in this experiment as a quantitative technique for the analysis of copper (II) ion. Suggest sources of errors and ways of minimizing the error
C19 H17 Cl F N3 O5 S (all one compound, spaced them so it's easier to see) contains 8 double bonds. How many rings are present. (note treat sulfur as you would oxygen)
Draw all the possible Newman projections of bromoethane. The rotational energy barrier about the C-C bond is 3.7kcal/mole. What is the energy cost of eclipsing a C-H and C-Br bond
What type of crystal (atomic, molecular, ionic, metallic, or network covalent) are crystals of each of the following:
The ratio of oxygen (Oxygen-16 and Oxygen-18) isotopes is measured and used to determine the approximate temperature during the time that part of the ice core was formed. This method is one example
Determine the molar internal energy (kJ/mol) of HCl (B = 10.59 cm-1 and ? = 2886 cm-1) under standard thermodynamic conditions. For the vibrational part, use N = nNa.
What is the energy change when the temperature of 12.3 grams of solid tin is decreased from 38.1 C to 24.7 C
Using data from the Appendix, calculate the temperature where Keq = 1.00. You may assume that deltaH0 and deltaS0 are independent of temperature.
what mass of precipitate will form if 1.50 L of concentrated Pb(CLO3) is mixed with 0.550 L of 0.230 M NaI ? assume the reaction goes to completion.
According to the following reaction, how many moles of potassium sulfate will be formed upon the complete reaction of 0.462 moles potassium hydrogen sulfate with excess potassium hydroxide
According to the following reaction, how many moles of zinc hydroxide will be formed upon the complete reaction of 0.292 moles zinc oxide with excess water
According to the following reaction, how many moles of water are necessary to form 0.868 moles magnesium hydroxide? magnesium nitride (s) + water (l) --------> magnesium hydroxide (aq) + ammonia (a
According to the following reaction, how many moles of oxygen gas are necessary to form 0.221 moles nitrogen monoxide
Table salt, NaCl(S), and sugar, C12H22O11 (s), are accidentally mixed. A 4.50-g sample is burned and 2.90 g of CO2 (g) is produced. What was the mass percentage of the table salt in the mixture
According to the following reaction, how many moles of ammonium nitrate are necessary to form 0.625 moles water
According to the following reaction, how many moles of sulfur trioxide will be formed upon the complete reaction of 0.429 moles sulfur dioxide with excess oxygen gas
How many MOLES of phosphorus triiodide are present in 7.73E+22 molecules of this compound
How many MOLECULES of phosphorus triiodide are present in 3.72 moles of this compound
The precipitation of aluminum hydroxide, Al(OH)_3 (K_sp)=1.3 x 10^{-33}), is sometimes used to purify water. At what pH will precipitation of Al(OH)_3 begin if 5.70 lb of aluminum sulfate, Al_2(SO_4
an automobile achieves a gas mileage of 34.0 mi/gal. how many kilometers can it travel on 1.5 L of gasoline.
what volume of 0.150 M KCl solution is required to react completely with 0.150 L of a 0.175 M Pb(NO3)2 solution according to the chemical reaction