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For each of the following species, draw its Lewis-dot structure. If the species exhibits resonance, draw all the resonance hybrids. For each species, tell its shape, bond angles, hybridization of the central atom, and whether it is polar or nonpolar.
A. (PCl3)2-
B. (NO3)-
C. (TeBr4)2+
what would happen to the molar mass of the solute if the thermometer used actually read 1.4 degrees Celsius too high?
The results of this test demonstrate that the compound is 83.24% C and 16.76% H with a molar mass of 72 g/mole. What is the molecular formula for this compound?
what is the change in pH after addition of 10.0mL of 1.0M sodium hydroxide to 90.0mL oof a 1.0M NH3/1.0M NH4+ buffer? (Kb for ammonia is 1.8 X 10-5)
What percentage of Phospine is decomposed after 1.25 min? c) How long will it take to decompose one fifth of the phosphine?
What mass of NaOH is needed to precipitate the Cd^{2+} ions from 39.0 mL of 0.550 M Cd(NO3)2 solution?
calculate the percentage of empty space in 1 mol of water at 25C. Obtain the density from the experiment " Some Measurements of Mass and Volume." The volume of a molecule of water can be taken as the sum of the volumes of the two hydrogen atoms.
A buffer solution is prepared by mixing 50.0mL of 0.300 M NH3(aq) with 50.0mL of 0.300 M NH4Cl(aq). The pKb of NH3 is 4.74. NH3 + H20 ----> NH4+ + OH-
A system expands in volume from 2.0 L to 24.5 L at constant temperature. Calculate the work (w) if the expansion occurs against a constant pressure of 5.00 atm.
Write balanced chemical equation and evaluate the molecular weight of the reactants and Calculate the molecular weights of the reactant.
Find out the concentration of this solution 1) in m (molality), 2) XHX (mole fraction of HX), 3)% w/w (percent by mass) if solvent in this solution is H 2 O. ?
A 1.348 gram sample containing an unknown amount of arsenic trichloride and the rest inerts was dissolved into a NaHCO3 and HCl aqueous solution.
Analytical molar concentrations of HA species 2) Equilibrium molar concentrations of HA species. Trichloroacetic acid (HA) is 73% ionized in water
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