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A sample of a compound of xenon and fluorine contains molecules of a single type; XeFn, where n is a whole number. If 5.0 x 1020 of these XeFn molecules have a mass of 0.172 g, what is the value of n?
a. 1b. 2c. 4d. 6
At 386 K, ?Go equals 124.0 kJ for the reaction, 2 H2S(g) 2 H2(g) + S2(g) Calculate the value of K for the reaction at this temperature. Give your answer in scientific notation to 3 significant figures
what is the molecular formula and empirical formula of NH2Cl, molar mass = 51.5 g/mol
Calculate the pH of the solution which results from adding 38.54 mL of 0.1012 M KOH to the cyanic acid/cyanate buffer of the previous problem(*). You must show appropriate chemical equations for full credit.
find the molarity when 7.85 moles aluminum chloride are dissolved in enough water to make a total of 600. mL
At a particular temperature, Kp = 0.25 atm for the reaction N2O4(g) 2NO2(g) a. A flask containing only N2O4 at an initial pressure of 4.5 atm
a sample of ironii sulfate was heated in an evacuated container to 920 k where the following reactions occurred. 2
If 40.0 g of methane (CH4) is confined to 2.50 x10^3 mL at 200 degrees celsius, what pressure in atm does it exert
A solution contains 0.25 M Ni(NO3) and 0.25 M Cu(NO3)2. can metal ions be separated by slowly adding Na2CO3? Assume that for successful separation 99% of the metal ion must be precipitated before the other metal ion begin to precipitate,
The solubility product constant (Ksp) for the dissolution of SrSO4 as represented by the chemical equation is 2.5 x 10-7.
molar mass of anbsp solvent is 68.2 gmol and a normal freezing point 31.9 oc. the freezing point depression constant k
What mass of sucrose should be combined with 521 of water to make a solution with an osmotic pressure of 8.15 at 285 ? (Assume the density of the solution to be equal to the density of the solvent.)
The number of resonance structures (not involving d orbitals) required to correctly describe the bonding in the linear ion Nâˆ'3 is:
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