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Sodium chlorate (NaClO3(s)) dissociates, during moderate heating to produce solid sodium chloride (NaCl(s)) and gaseous oxygen (O2 (g)). A 3.4671 g of impure sodium chlorate was heated until the evolution of oxygen stopped. The mass of sample residue was subsequently found to be 2.9073 g. What wt% of the original impure sample was really sodium chlorate? Assume that no gases will be evolved from the impurities.
The work function of an element is the energy required to remove an electron from the surface of the solid element. The work function for lithium is 279.7 kJ/mol.
If water at the boiling point is saturated with potassium hydrogen tartate, 30 mL of the solution requires 49.5 mL of 0.2 M NaOH in a titration. What is the KSP of potassium hydrogen tartate at this temperature and what is the solubility in g/L.
You have a sealed 8.10 L container with a mixture of nitrogen and helium gas at 25.85 oC. The gas mixture contains 0.204 atm of nitrogen and 1.54 g of helium. Calculate the mole fraction of helium in the container.
If 8.00 mol of NH3 reacted with 14.0 mol of O2, how many moles of H20 will be produced?
What is the wavelength of an electron (mass= 9.11 x 10^-31 kg) moving with a velocity
Write an equation for the formation of an acetal from reaction of excess methanol with benzaldehyde in the presence of an acid catalyst.
Find the concentration of Pb2 in 0.0010 M KI saturated with PbI2. Include activity coefficients in your solubility-product expression. The Ksp of PbI2 is 9.8× 10-9. Hint from sapling below: Including activity coefficients, the solubility-product e..
The vapor pressure of methanol at 30. oC is 158 torr. What mass (in grams) of methanol actually evaporates?
A certain polymer (Tg=10?) has a melt viscosity of 1.5x105 poises at 25?. Estimate its viscosity at 60?.
sammy put away 10 of his 75000 per year salary for the 45 years he is working into 401k and ira savings plans and
The conversion of glucose into lactic acid drives the phosphorylation of 2 moles of ADP to ATP and has a deltaG= -135 kJ/mol. What is the deltaG for the conversion of glucose into lactic acid
When a student cleans their dorm room, the entropy of the system must decrease. How is this NOT a violation of the second law of thermodynamics?
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