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The 0.500 M solutions of Na2CO3 and CaCl2 were prepared ahead of time. The CaCl2 is purchased in the hydrated form; it contains one mole of water for each mole of the compound, Na2CO3 * H2O, and has a formula weight of 124.01 g/mol. To prepare 100 mL of a 0.500 M solution of this hydrated form requires 0.0500 moles of this salt. Calculate the grams of this compound that equals 0.0500 moles, showing all your calculations.
What is the molarity of H2C4H4O6 if 31.75 mL of 0.1749 M KOH are required to react with 10.04 mL of H2C4H4O6 solution according to the reaction below
If the aqueous solution in the above problem with ammonia was also allowed to equilibrate with an atmosphere containing 10 3.5 atm carbon dioxide
A 20.0-L nickel container was charged with 0.835 atm of xenon gas and 1.44 atm of fluorine gas at a 400 degrees C. the xenon and fluorine reacts to form tetrafluoride. what mass (G) of xenon tetrafluoride can be produced assuming 100 percent yield..
Calculate the energy in kJ/mol needed to remove the electron from n=1 in a mole of hydrogen atoms. what is this energy called?
The inital concentration of HBr in a reaction vessel is 1.2 x 10 ^-3 mol/L. If the vessel is heated to 500 K, WHat is the percent decomposition of HBr and the equilbirum compositions of the mixtures?
What is the conversion calculation for M to grams of KBr for the following: What mass of potassium bromide is contained in 135 mL of 0.251 M Kbr solution
Consider the following reaction. N2 + 3H2 ->2NH3 . 28.0 grams of N2 and 5.04 grams of H2 are reacted, producing 17.8 grams of NH3. What is the percent yield?
The tetrahedral intermediate in the Fischer esterification of formic acid (HCO2H) with 1-butanol has the structure
Calculate the pH at 25 degrees C of a 0.25-M aqueous solution of oxalic acid (H2C2O4). (Ka1 and Ka2 for oxalic acid are 6.5 x 10^-2 and 6.1 x 10^-5, respectively.)
Frank and Oswalt report a molar absorptiity of 4700 L mol ^-1 cm ^-1 for the thiocyanatoiron (III) ion.
A mixture consisting of .150 mol H2 and .150 mol I2 is brought to equilibrium at 445 degrees celcius in a 3.25 L flask. What are the equilibrium amounts
Calculate the number of lines per centimeter that should be etched in the grating for each of the following conditions:(a) A first order diffraction angle (?) of -27° for visible light of 600 nm wavelength
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