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What is the correct electron configuration for copper? Answer a. [Ar]4s23d8 b. [Ar]4s23d9 c. [Ar]4s13d10 d. [Ar]3d10 e. [Ca]3d9
Oxygen makes up 46.7 % by mass of the Earth's crust. How many grams of oxygen are present if a sample of the Earth's crust has a mass of 335 g
What is the pH of a 2:1 mixture of H2PO4- to HPO42- at 0.005 M ionic strength. (See the table for the activity coefficients.)
For the series of spectral lines of atomic hydrogen with n1 = 3, which of the following wavelengths does not correspond to a wavelength predicted by the Rydberg equation? Rydberg equation: 1/? = (1.097 x 107 m-1) x (1/n12 - 1/n22) ----- A. 1875 nm..
Assuming that no heat is lost to the cup or the surroundings, what will the final temperature of the water be? The specific heat capacity of iron = 0.449 J/g°C and water = 4.18 J/g°C.
Describe the preparation of 1L solution of 0.02M Tris buffer, PH 7.8. 3. What volume of glacial acetic acid (d= 1.06g/ml) and what weight of solid potassium acetate are required to prepare 5 liters of 0.2M acetate buffer,PH 5.0?
write the MO configuration of N2^+ and terms symbol for the ground state and excited states. show the photoelectron spectrum of N2. Assign short and long progression band.
Why is HC2H3O2 not a good conductor or strong electrolyte?
Calculate the fraction of space that is occupied by packing spheres in the (a) simple cubic, (b) body-centered cubic, (c) face-centered cubic (close packed) structures
3.47 Annual floods for a stream are normally distributed with a mean of 30,000 cfs and a variance of 1 x 106 cfs2. Determine the average return period Tr of a 32,000-cfs flood in the stream.
determine that the temperature of your distilled water is 24.5°C. You carefully determined the mass of a clean dry beaker and found that it was 58.1884 g.
For the reaction 2C6H6 + 15O2 → 3CO2 + 6H2O 30 grams of C6H6 are allowed to react with 79.09 grams of O2.
What mass of ammonium chloride should be added to 2.45L of a 0.145M NH3 in order to obtain a buffer with a pH of 9.45
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