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A 0.879-g sample of a CaCl2*2H20/K2C2O4*H20 solid salt mixture is dissolved in-150mL of deionized water, previously adjusted to a pH that is basic. The precipitate, after having been filtered and air-dried, has a mass of 0.284 g.
A. Write the molecular form of the equation for the reaction.
B. Write the net ionic equation for the reaction
C. How many moles and grams of CaCl2*2H20 reacted in the reaction mixture?
D. How many moles and grams of the excess reactant K2C2O4*H20 reacted in the mixture?
The radioactive decay of Tl-206 to Pb-206 has a half-life of 4.20 min. Starting with 3.70 1022 atoms of Tl-206, calculate the number of such atoms left after 38.0 min.
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If 110. g of ethanol is needed for a chemical reaction, how many litres of ethanol would be required. (The density of ethanol is 0.789 g/ml).
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Compute the amount of heat evolved in the oxidation of 32.0 grams of Fe at the temperature 25 oC and pressure 1 atm pressure ( ΔHfo(Fe 2 O 3 ,s) = -824kJ/mol)
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The normal boiling points of CO and SO2 are -192c and -10c, respectively. a) At 25c and 1 atm, which gas would you expect to have a molar volume closest to the ideal value
At 27°C, a sample of sulfur dioxide (SO2) has a volume of 30.0 mL.
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