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Assume you are assigned to prepare 0.250 g of orpiment. Describe how you would go about doing so. Make sure to include all the amounts of materials and the equipment you would use. You should plan to use this procedure as your guide for perparing your assigned pigment during the test.
1.75 pounds of pasta dough with a density of about .84g/cm^3 how many feet of 2" wide, 1/32" thick lasagna noodles can be made
1.45 g sample of an iron ore is dissolved in acid and the iron obtained is fe2 aq. to titrate the solution 21.6 ml of
How many liters of O2 are needed to react completely with 45.0L of H2S at STP? 2H2S(g) + 3O2(g) -> 2SO2(g) +2H20(g)
What it the chemical reaction between silver ion and excess ammonia.
draw the structure of p-aminobenzoic, and show all importnant resonance structures for this molecule
Calculate the pH of a solution that is formed when 25.0 mL of 0.24 M ammonia (Kb = 1.8 x 10-5) is mixed with 25.0 mL of 0.20 M ammonium chloride.
write the balanced chemical equation for each of the following equilibrium constant expressions: a)Kc=[CO2][H2]/[CO][H2O. b)Kc=[H2][F2]/[HF]^2. c)Kc=[O2][HCl]^4/[Cl2]^2[H2O]^2. d)Kc=[CS2][H2]^4/[Ch4][H2S]^2.
What is the final temperature of the mixture if the heat of acid-base neutralization (?Hneut) = ?57 kJ per mole of H2O formed
A sample of 0.255 mole of gas has a volume of 748 mL at 28°C. Calculate the pressure of this gas. (R= 0.0821 L · K)
Molecular formula of C10H14. The carbon NMR shows 7 carbon peaks and 4 H peaks. H(4) broad multiplet at 7.0, H(3) singlet at 1.4, H(1) multiplet at 1.2, and H(6) doublet at 1.0. Has strong UV absorbance at 260nm
Predict the products when cyclohexanol is heated in the presence of H+. Show both the organic product and the byproduct
Predict the order of elution for the silica gel adsorption TLC separation of the mixture containing benzyl alcohol, benzaldehyde, and benzoic acid using methylene chloride solvent. Explain
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