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The gas from a certain volcano had the following composition in mole percent (that is, mole fraction multiplied by 100). 56.0% CO2, 34% H2, 5.4% HCl, 2.4% HF, 2.1% SO2, and 0.1% H2S
What would be the partial pressure of each of these gases if the total pressure of volcanic gas were 760. mmHg?
You measure 50,000 decays of a radioactive sample in 20 seconds. You measure the same sample 50 days later and observe only 10,000 decays in 20 seconds. What is the half life of the radioactivity
A 50.0-mL sample of 2.0 x 10-4 M CuNO3 is added to 50.0 mL of 4.0 M NaCN. Cu+ reacts with CN- to form the complex ion [Cu(CN)3]^2: [Cu(CN)3]^2- Cu+ (+) 3CN- K = 1.0 x 10^-9
What is the molar concentration of a solution containing 45.6 grams of NaCl added to 2.00 liters of water at 20 degrees Celsius? Density of water at 20 degrees Celsius = 0.998 g/mL
Write down mass balance and charge balance equations for 0.100mol L-1 Na2C2O4(aq). Mass Balanced Equation= Charge Balance Equation=
Draw a diagram of a molecule of H2O ( Water), showing the outer layers and how the individual electrons are shared. 3. Why does each atom feel more stable?
Work out the solubility of copper(II)sulfide. Take it that 1 litre of the mixture weighs 1 kg. (in g/100g), CuS (s) Cu^2+ (aq) + S^2- (aq)
In heating an organic compound strongly with metallic sodium, one frequently observes the formation of a blck material, which is insoluble in water
a solution is prepared by dissolving 2.86 grams of sodium chloride 3.9 grams of ammonium sulfate and 0.896 grams of
at a certain temperature 0.200 moles of no 0.300 moles of cl2 and 0.500 moles of clno were placed in a 25.0 l vessel
The molar mass of an unknown salt is 75.6. If 2.29 g is added to 71.2 mL of water the temperature changes from 20.70oC to 21.39oC. What is the molar heat of solution (J/mol) of the salt?
What are the possible values of n and ml the principal and angular momentum quantum numbers for an electron in a 5d orbital
liquid heptane c7h16 burns in oxygen gas to yield carbon dioxide and water. what mass of carbon dioxide is produced
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