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A gas cylinder that contains argon has an internal volume of 2.24 L. A pressure gauge attached to the cylinder reads 2110 psi (1 atm = 14.7 psi) at 22.2 °C. Explain what mass of argon is contained in the cylinder?
Use the Rydberg equation to calculate the wavelength (in Å) of the photon absorbed when a hydrogen atom undergoes a transition from n = 1 to n = 5.
Explain which of the following aqueous solutions has the strongest ion-dipole attractions: 0.3 M Na3PO4, 0.1 M NiF2, 0.2 M Rb2CO3, 0.01 M Sr(OH)2, , 0.03 M ScBr3.
A 130 mL stock solution contains 1.3 M Na3PO4. When 10 mL of the stock solution is diluted to 21 mL, what will the concentration of Na+ ions be?
The hypothetical element, Bc, has three stable isotopes. The isotopic abundances and masses of the three isotopes are
calculate the number of grams of nitrogen dioxide gas formed when 1.22 moles of ammonia nh3 react with 2.14 moles of
A solution of 2.00 g of para-dichlorobenzene (a clothes moth repellent) in 50.0 g of cyclohexane freezes at 1.05 degrees Celsius. What is the molar mass of this substance?
In Horner-Wadsworth-Emmons reaction, a 1,2-disubstituted alkene was produced in which the olefinic protons exhibited at vicinal coupling of 9.0 Hz in the 1H NMR. What is the stoichiometry of the double bond.
Explain when solutions of lanthanum (III) bromide as well as potassium oxalate are mixed, a precipitate of lanthanum (III) oxalate forms. Define the morality of the potassium oxalate solution if 94.0 mL are necessary to react with 24.5 mL of 0.240..
Some 2-methyl-2-butene may be produced in the reaction as a by-product. Give a mechanism for its production. (The experiment was to react t-pentyl alcohol with HCl.)
Draw electron dot structure for the following molecules or ions notes En (electronegativity of Sb, Se, CL O are 1.9, 2.4, 3.0 respectively (a) SbCL3 (b) SeOCL2 (c) BF4- (d)C2H5CL
How many salt complexes would result if you treated racemic phenethylamine with racemic tartaric acid? After treating them with NaOH and extracting
calculate collapse energy i.e. pe change of world trade towers 410 m tall total mass 1.25 mega tons calculate change
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