Answers by JoeannKeaton

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How can chemistry students overcome the challenges of insufficient funding for chemistry education in their institutions?

answered 1 day ago in Chemical education

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Calculate the standard enthalpy change for the precipitation reaction that takes place when 25.0 mL of 0.250 M barium chloride (BaCl2) and 50.0 mL of 0.100 M sodium sulfate (Na2SO4) react to form a precipitate of barium sulfate (BaSO4). The density of each solution is 1.00 g/mL and the specific heat capacity is 4.18 J/g°C. Assume a constant temperature of 25°C.

answered 2 days ago in Chemical thermodynamics

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What is the concentration of a solution containing CuSO4 if its absorbance is 0.472 at a wavelength of 620 nm? The molar absorptivity of CuSO4 at this wavelength is 2.34 x 10^4. The solution has a path length of 1 cm.

answered 6 days ago in Analytical Chemistry

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What is defined as a change in the inherited traits of organisms over time?

answered Jan 6 in Science

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