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The electron affinity of tin (Sn) is -107 kJ/mol. (In this case, the negative sign of EA means that energy is required to remove an electron from the negative ion.) If the outer electron in a Sn- ion is removed by absorbing a photon of visible light having an energy of 3.776E-19 J, what is the amount of leftover energy that goes into the kinetic energy of the ejected electron?
If the H+ ion concentration in an aqueous solution at 25.0 °C is measured as 6.6 x 10-4 M, then the pH is 1) 3.00 2) 3.18 3) 6.60 4) 9.55 5) 10.82
what is the pH of NaNO3 what is the pH of HNO3 what is the pH of NH3(aq) what is the pH of (NH4)2CO3 what is the pH of CO2 what is the pH of KC2H3O2 what is the pH of HC2H3O2 what is the pH of KCL
The partial pressures of gas A and gas B, respectively, are 0.379 atm and 0.675 atm. If 0.190 mol a third gas is added with no change in volume or temperature, what will the total pressure become?
CaCO 3 ( calcium carbonate ) is insoluble in water. would this ionic compound conduct electricity. why/why not.
at a certain temperature the vapor pressure of pure benzene c6h6 is 0.930 atm. a solution was prepared by dissolving
hof also known as hypofluorous acid is very unstable decomposing in a first-order reaction to give hydrogen fluoride
If it is known that 41.6 grams of PURE ELEMENT THAT IS NOT DIATOMIC represents 1.30 moles of this element, what is the atomic mass of the element?
The boiling point of water is about 200 degrees Celcius higher than one would predict from the boiling points of hydrogen sulfide and hydrogen selenide. One may explain this apparent anomaly by which of the following?
what has the lowest freezing point, pure water, aqueous .60m glucose, .60m sucrose, .20m iron iodide or .50m potassium chloride
how many grams of oxygen are collected in a reaction where 222 ml of oxygen gas is collected over water at a
What wavelength of radiation will be emitted when an electron in a hydrogen atom jumps from the n=5 to the n = 1 principal energy level. Name the region of the electromagnetic spectrum corresponding to this wavelength
Sodium Carbonate (NaCO3) is available in very pure form and can be used to standardize acid solutions. What is the molarity of the HCl solution if 25.3 mL of the solution is required to react with 0.256 g of Na2Co3
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