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1) Why are certain elements placed in specific columms in the modern periodic table?
2) Where on the modern periodic table would you probably find an element that is a dense gas at room temperature? EXPLAIN
3) What should be the most metallic element?
Calcium concentrations in solutions may be determined by a complex-forming reaction with EDTA. The reaction takes place between Ca2+ and EDTA4- with a formation constant of 4.5 x1010.
What is the wavelength in micrometers of a photon emitted from a Hydrogen electron relaxing from the
when methane CH4 reacts with oxygen gas O2, water and carbon dioxide are formed. if 25.0 liters of oxygen reacts at 125.0C and 2.00 atm with 22.00L of methane initially
When hydrochloric acid of 200 mL was mixed to a small piece of CaCO3 in the same calorimeter, the temperature increased by 4.25 degree celsius. determine the heat output for this reaction?
What molar ratio of benzoate ion to benzoic acid would be required to prepare a buffer with a pH of 5.20? [Ka(C6H5COOH) = 6.5 × 10-5]
What is the pH of a buffer prepared by adding 0.809 mol of the weak acid HA to 0.406 mol of NaA in 2.00L of solution? The dissociation constant of is 5.66*10-7
why is significant serum (in the blood stream) chlorestrol reduction so difficult, and why do most of the drugs designed to reduce
The energy levels of hydrogenlike one-electron ions of atomic number Z differ from those of hydrogen by a factor of Z^2. Predict the wavelength of the transition
A buffer solution was prepared by adding 4.95 g of sodium acetate, NaCH3CO2, to 2.50 x 10^2 mL of 0.150 M acetic acid, CH3CO2H. What is the pH of the buffer?
What is the most important effect of antisymmetrization in electon-electron interaction? Where did antisymmetrization come from? Explain from different statistics of distinguishable particle, indistinguishable particle
Express b in terms of the mass m of each atom and the temperature T of the gas( and other constants), given that the Boltsmann factor in P(cx) pertains to the x- component of the kinetic energy of each atom in the gas.
Gas stoichiometry and Percentage of calcium carbonate in the sample
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