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Four resonance structures of the following cation are possible. Two resonance forms are given below, but they are incomplete. Complete the given structures by adding nonbonding electrons and formal charges. Draw the two remaining resonance structures (in any order), including nonbonding electrons and formal charges. Which is the most stable?
How many cubic centimeters are in an 8.00 oz bottle of cough medicine? (1.00 oz=29.6 mL)
How many ppm Pb2 ion are contained in this solution? How many ppm of nitrate ion are contained in the same solution?
Calculate the fraction of atom sites that are vacant for silver at 695°C. Assume an energy for vacancy formation
A sample of solid having a density of 3.43 g/cm3 had an apparent mass of 13.9264. The density of the balance weights is 8.00 g/cm3. Calculate the true mass of the object.
A calorimetry experiment determined that the combustion of 1.01 g of H2 reacting with excess O2 producing H2O gave q=143 kJ. Calculate the change in enthaply.
Some chemists believe that satisfaction of the octet rule should be the top criterion for choosing the dominant Lewis structure of a molecule or ion.
Explain why in an aqueous electrochemical cell, nitrate ions never react at the anode, but nitrite ions do
What percent error results from the assumption that the density of water is 1.000 g/ml at 20 C
magnesium chloride are used to make a solution with a final volume of 1.74L, then waht is the final Mg2+ ion concentration in ppm?
A multiple stage evaporate process concentrates a weak solution of LiOH from 4.48 wt% to 26.78wt%. This evaporator processes 10 metric tonnes of solution each day.
a liter of solution contains 0.140 M Ca+2 and 0.140 M Pb+2. They are to be seperated using chromate (CrO4-2) to selectively precipitate out one metal.
What chemical reaction takes place when solid sodium sulfide is dissolved? Explain by writing the chemical equation. Include physical states for all species (including liquid for water).
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