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FE3+ SCN <-> FeSCN2, how will adding potassium thiocyanate (KSCN) initially change [Fe^3+], [SCN], and [FeSCN^2+)? how should equilibrium system respond to the change?
what is the minimum atomic radius required for a cubic closest-packed metal to accommodate boron atoms (radius 88 pm) in its octahedral holes?
What is the work done by the copper bar on the surrounding atmosphere? The density of copper at 20 degree celsius is equal to 8920 kg/m3.
Geologists can estimate the age of rocks by their uranium-238 content. The uranium is incorporated in the rock as it hardens and then decays with first-order kinetics and a half-life of 4.5 billion years
Calculate the binding energy for Cf-253 if one atom of this nuclide has an atomic mass of 253.08249. Express your answer in units of picojoules/nucleus where 1 picojoule = 1x10-12 joule.
A sample of urea contains 1.009 g N, 0.145 g H, 0.432 g C, and 0.576 g O. What is the empirical formula of urea?
Consider a metal atom, which we will give the symbol M. Metal M can readily form the M+ cation. If the sphere on the left below represents the metal atom M, which of the other three spheres would probably represent the M+ cation? Explain your choi..
When 20.0 grams of an unknown compound are dissolved in 500. grams of benzene, the freezing point of the resulting solution is 3.77°C. The freezing point of pure benzene is 5.48°C, and Kf for benzene is 5.12°C/m. What is the molecular weight of th..
Write a balanced net equation for the reaction of Na2S with water. writing a net equation, and sodium ions are spectator ions.
Identify the two important classes of catalysts. Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (substrate) to form an unstable intermediate.
what mass of limestone is required to remove all the sulfur dioxide formed by the combustion of 7.5 104 kg of coal that is 0.33 mass % sulfur?
Why is sodium bicarbonate used instread of sodium hydroxide for the initial extraction
A small cube of aluminum measures 15.6 mm on a side and weighs 10250 mg. what is the volume of this cube in cubic cm? how would I find this out.
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