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What is the %Cu (by mass) in the metal oxide product formed when Cu2CO3(OH)2 decomposes upon heating above 200°C?
a)79.9%b)88.9%c)66.5%d)27.2%
A sample of a gas occupies a volume of 323 mL at 625 torr. At constant temperature, what will be the new volume when the pressure changes to the following:
What is the half-life of a second-order reaction in which 45.0% of the original concentration of 1.00 M remains after 325 seconds?
What is the oxidation half reaction, Reduction half reaction, and overall reaction for Chloride + permanganate --->
Write a net ionic equation to explain why the pH didn't go up to about 10, as it would have if that amount of NaOH were added to distilled water or to 20ml 0.00040 M HCL, which also would have a pH of 3.40
15 g of steam at 373 K is added to 250 g of H2O (liquid) at 298K at onstant pressure of 1 bar. Is the final state of the system steam or liquid water? Calculate changes in entropy for the process.
Heat is lost to the styrofoam calorimeter. Assuming a 6.22 C temperature change for the reaction of HCl(aq) with NaOH(aq), calculate the heat loss to the inner 2.35-g styrofoam cup. The specific heat of styrofoam is 1.34 J/gC.
A pound of coffee beans yields 54 cups of coffee (4 cups = 1qt ). How many milliliters of coffee can be obtained from 1g of coffee beans?
The molecular mass found by mass spectrometry is 210.06 amu. What is the molecular formula of the compound?
A student in a hurry decides to let the solvent travel only half way up the chromatographic paper in chromatogram 2. predict the effect of this procedural change on the resultion
will 500 mg of Na3C6H5O7 (258.1g/mol) or 500 mg of CaCO3 (100.1g/mol) neutralize more moles of hydronium ion? Assume that both the C6H5O7^(3-) and CO3^(2-) ions become fully protonated.
A total of 2.00 moles of a compound is allowed to react in a foam coffee cup that contains 127g of water. The reaction caused the temperature of the water to rise from 21.0 to 24.7 celcius .
What specific properties are mentioned in the organization of the real periodic table? How do they relate to the current model (pages 192 - 193)?
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