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A particular x-ray has a wavelength of 1.6 Å. Calculate the energy (in J) of one photon of this radiation. J
Classify the solid state of the following substances as ionic crystals, covalent crystals, molecular crystals or metallic crystals: (a) CO2 (b) B12 (c) S8 (d) KBr (e) Mg (f) SiO2 (g) LiCl (h) Cr
Mercuric sulfide HgS is one of the least soluble salts known, with Ksp=1.6x10^-54 at 25 C. Calculate both the molar solubility and the solubility of HgS
isopentyl alcohol, how many grams of isopentyl acetate could you theoretically produce assuming only a 65% attainable yield?
105 cm3 of 2MSulphuric acid is required to neutralise 420 cm3 of potassium hydroxide. What is the concentration of potassium hydroxide?
In the unbalanced reaction, Sn + HNO3 ---> Sn(NO3)2 + H2), 2.100 grams of Sn(NO3)2 was formed. How many grams of NO were formed and how many moles of HNO3 were reacted? (HINT: the coefficient of Sn is 3).
How many grams of Na3PO4 will be needed to produce 400ml of a solution that has a concentration of Na+ ions of 0.900 ?
Based on the half-reactions and their respective standard reduction potentials below, which addition to an aqueous solution containing Fe(NO3)2 will result in a reaction under standard-state conditions?
The Cd2+ was displaced from EDTA by the addition of an excess of CN-. Titration of the newly freed EDTA required 29.2 mL of 0.0120 M Ca2+ . What were the molarities of Cd2+ and Mn2+ in the original solution
a step by step answers for those Question please. Please be brief. What is the PH of a buffer prepared by combining 25mL of 0.1M nitrous acid with 25mL of 0.1M sodium nitrite?
the electron shifts resulting in the ring closure. draw diagrams of the products.
calcium carbonate , CaCO3, reacts with stomach acid (HCl, hydrochloric acid) according to the following equation: CaCO3(s) + 2HCl(aq) > CaCl2(aq) + H2O(l) +CO2(g). one tablet of tums, an antacid, contains 500.0 mg of CaCO3. if one tablet of tums i..
A gas cylinder containing 6.38 mol of neon has pressure of 491mmHg at 295k. If 3.22 mol helium is added at constant temp and pressure, what will be the pressure in the cylinder
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