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Using the Bohr formula for the radius of an electron orbit, estimate the average distance from the nucleus for an electron in the innermost (n = 1) orbit of a cesium atom (Z = 55). (in m)
Approximately how much energy would be required to remove this innermost electron? (in keV)
Consider the following reaction to answer the questions below. 2H2S (g) + SO2 (g) ?? 3S (s) + 2H2O (g) ?H° = -145 kJ. At what temperature would the forward reaction become non-spontaneous
A grating has 8,000 slits ruled along a length of material of 4 cm. Explain what is the wavelength and approximate color of the light whose 5th order maximum diffracts at an angle of 45 degrees from the grating normal
evaporating sweat cools the body because evaporation is endothermic and absorbs 2.44 per gram of water evaporated.
calculate the theroretical yield of C2H5Cl when 123 g of C2H6 reacts with 220 g of Cl2, assuming that C2H6 and Cl2 react only to form C2H5Cl and HCl
Cobalt-60 exhibits first order decay and has a half-life of 5.26 years. If it must be replaced in a radiotherapy unit when its radioactivity decreases to 75% of its original value, how long can a 1.00 g sample be employed?
In reference to question 6-88a: a. Explain why borane (BH3) reacts readily with the pi electron system of an alkene. b. Explain why diborane (B2H6) reacts only very slowly with C double bond C groups
What is the expected freezing point of a solution of 110.5 g of H2SO4 in 225 g of water? Assume sulfuric acid completely dissociates in water.
Determine the amount of work that must be supplied to the compressor and the temperature of the gas leaving the compressor b) Determine the heat load on the heat exchanger
A 150 g sample of water (initially at 45.0oC)is mixed with a 200 g sample of water (initially at 84.0oC). Find the final temperature of the system
At equilibrium, the concentrations in this system were found to be [N2] = [O2] = 0.100 M and [NO] = 0.400 M. If more NO is added bringing its concentration to 0.700 M explain what will the final concentration of NO be after equilibrium is re-establ..
An ideal gas is allowed to expand from 8.40L to 12.6L at constant temperature. By what factor does the volume increase. The pressure will increase by same factor
Even with a drying tube, leaving phenylmagnesium bromide exposed to air will eventually lead to its decomposition. Why? What is the product of this decomposition pathway?
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