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A sample of metallic elemnt X, weighing 3.77 grams, combines with 0.615L of 02( at normaal pressure and 20 degree C) to form metal oxide with the formula XO. If the density of )2 gas under these conditions is 1.330 g/L, what is the mass of this oxygen? The atomis oxygen is 15.9994 amu. What is the atomic weight of X?
calculate the binding energy of the 2s electron in iron.the five highest energy peaks in the photoelectron spectrum of
Oxalic acid, H2C2O4 has acid dissociation constants Ka1 = 5.9 x 102 and Ka2 = 6.4 x 105. What is the pH after 20.00 mL of 0.0500 M NaOH is added to 5.00 mL of 0.2000 M H2SO3
A scientist has a sample of gas that was collected several days earlier. The sample has a volume of 392 cm3 at a pressure of 0.987 atm and a temperature of 21°C.
Picric acid has been used in the leather industry and din etching copper. However, its laboratory use has been restricted bycause it dehydrates on standing and can become shock sensitive. It has an acid dissociation constant of .42. What is the [H..
determine the amount of heat required to convert 2.3 mol of ice at -13.1 degrees celcius to liquid water at 21.6 degrees celcius.
Draw the best Lewis structure of CO32-. In this compound, the C atom is attached to three O atoms, and there are no O-O bonds
Compare and contrast the nitrogen requirements of microorganisms and higher forms of life, describing how their respective requirements are met
The Lyman series in the hydrogen atom corresponds to transitions that originate from the n=1 level in absorption or that terminate in the n=1 level for emission. Calculate the energy, frequency, and wavelength of the least and most energetic transiti..
Calculate the mass of aluminum deposited on the purified aluminum metal by the application of a current of 1.225 kiloamperes for 30 minutes from a very large quantity of a solution containing Al3+ ion in the Al2O3/Na3AlF6 molten state
The Al2O3 does not react. If the sample residue weighs 2.717 g, what is the mass fraction of Fe2O3 in the original sample?
Calculate the potential volume of the gas contained in 500-mL aerosol can when it is heated from 25 degrees C to 54 degrees C (approx. 130 degrees F) assuming a constant pressure.
6NaOH + 2Al -> 2Na3AlO3 + 3H2 What volume of hydrogen gas (measured at STP) would result from reacting 75.0g of sodium hydroxide with 50.0g of aluminum?
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