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The tetraethyl lead Pb(C2H5)4 in a25.00 mL sample of aviation gasoline was shaken with 15.00 mL of0.02177 M I2. (Hint: one mole of I2 reactswith one mole of the tetraethyl lead). After the reaction was complete, the unused I2 was titrated with 6.94 mL of0.02607 M thiosulfate solution. Calculate the weight of Pb(C2H5)4 (MW = 323.4 g/mol) in each liter of gasoline.
When determining the effective nuclear charge for a 1s electron, Slater's rules dictate that the other 1s electron must have a value of 0.30 not 0.35. Why?
the label on an aerosol spray can contains a warning that the can should not be heated to over 130degf because of the
Does the presence of water vapor affect the result? Explain why it does or does not have a large affect on the value obtained.
An oxygen cylinder has a volume of 50.0 liters and a pressure of 200.0 atmospheres. If this cylinder is used to supply oxygen to a patient at a flow rate of two liters/minute ( at 1.00 atm pressure) how long will the take last
Calculate Ecell for the oxidation of Cl(aq) to Cl2(g) by PbO2(s) in an acidic solution. Assume all other reactants and products, except for H+, are in their standard states for the below values. Round your answer to 3 decimal places. Enter scienti..
The standard enthalpy change for the reaction below is 436.4 kJ/mol. Calculate the standard enthalpy of formation of atomic hydrogen (H). H2(g)-->H(g) + H(g)
a substance has a specific heat capactiy of 2 jg c. how many joules are needed to raise the temperature of 30 g of this
What concentration of NH3 is needed to lower the Cu2+(aq) to 6.4 x 10-14M in a solution that was originally 1.43 x 10-4 M in Cu2+(aq)
A natural gas consisting of pure methane enters a furnace along with a 50% excess air at 25 degrees C. Assuming an adiabatic combustion, estimate the theoretical flame temperature
calculate an approximate heat of reaction for the combustion of one mole of methane gas ch4 to form gaseous h2o and
sodium carbonate na2co3 is used to neutralize the sulfuric acid spill. how many kilograms of sodium carbonate must be
What is the pressure of a 10g sample of sulfur trioxide in atmospheres at a temperature of 20 degrees Celsius that has a volume of 50L
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