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Imagine a universe in which the four quantum numbers can contain the same possible values as in our universe except that the angular-momentum quantum number l can have integral values of 0, 1, 2, ..., n+1 (instead of 0, 1, 2, ..., n?1).
1) Explain how many elements would be in the first two rows of the periodic table in this universe?
2) Explain what would be the atomic number of the element in the second row and fourth column?
A buffer, consisting of H2PO4- and HPO42-, helps control the pH of physiological fluids. Many carbonated soft drinks also use this buffer system.
Hospital X-ray generators emit X-rays with wavelength of about 15.0 nanometers (\rm nm), where 1\;{\rm nm}= 10^{-9}\;{\rm m}. What is the energy of the X-rays
What is the charge associated with each side of the HI molecule? Express your answer in Coulombs to three significant figures.
the drops in temperature is measured by 113 degreed celsius when a 55 g sample of a certain metal and it loses heat of
Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal bioling point of -0.4 celsius. A 250 Ml sealed flask contains 0.55 grams of butane at -22.0 celsius. How much butane is present as a liquid?
At 1000 K the equilibrium constant for the reaction Br2 (g) === 2 Br (g) is 2.8 x 104 (pressure is in atmospheres). What does G for the reaction. Assume that the bond energy of Br2 does not change between 298 K and 1000 K and calculate S for the r..
Aluminum reacts with oxygen gas in a combination reaction to produce aluminum oxide. How many moles of oxygen gas are needed to react with 1.64 moles of aluminum
A 21.2 g sample of a metal was heated to 61.98 degrees C. When the metal was placed in a constant-pressure calorimeter containing 30.0 g of water, the temperature of the water rose from 24.69 degrees C to 29.27 degrees C. Calculate the specific he..
In the simulation, set the temperature of the sample gas to 304 . Click on the "Run" button and observe how the number of moles of the gas varies with an increase in the gas's volume
explain it is important to cerry out the determining the molar mass of a volatile liquid by the dumas method
A buffer solution contains 0.71 mol of boric acid (H3BO3) and 0.53 mol of sodium dihydrogen borate (NaH2BO3) in 4.00 L. The Ka of boric acid (H3BO3) is Ka = 5.8e-10. pH of buffer solution
a lead atom has a mass of 3.410-22g. how may lead atoms are in a cube of lead that has a volume of 2.00cm3 if the
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