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Problem- Add charges, single electron dots, and/or pairs of dots as appropriate to show the Lewis symbols for the most stable ion of each element. Treat n=4 as the valence shell in all cases.
To add formal charges, click the button below (which will turn yellow when activated) before clicking on the molecule. You may need to hit Enter on your keyboard after typing the charge to make it register before clicking submit.
Place charges and electron dots as needed on each ion. To add a charge, click the +/- button, then click on an atom and type the desired charge.
As, Se, Br, K, Ca, Ga
Explain each and every step in detail. I need proficient help in the above problems.
A 0.451 M solution of a weak acid, HA, has a pH of 4.01. Calculate Ka for the acid. Use E notation and 3 significant figures.
A mixture of O2, CO2, and N2 has a total pressure of 697. torr. In this mixture the partial pressure of O2 is 143. torr and the partial pressure of CO2 is 197. torr. What is the partial pressure of the N2 (in torr)?
For a Tellurium-132 sample, 6566 counts were observed between 5.0 and 8.0 hours after the preparation of the source, how many atoms were present when the source was prepared
A solution of ammonia and water contains 3.20×10^25 water molecules and 8.10×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
The combustion of ethane produces carbon dioxide and steam: 2C2H6 + 7O2 --- 4CO2 +6H20 How many moles of CO2 are produces when 5.55 mol of ethane are burned in an excess of oxygen.
In a particular solution, [Cr3+]=3.9x10-4 mol/L. What is the minimum pH at which Cr(OH)3(s) will precipitate from this solution. Assume the temperature is 25oC. For Cr(OH)3(s), Ksp=6.3x10-31 at 25oC. Give your answer with three digits
What is the concentration of the AgNO3 solution. How many grams of AgNO3 are precipitated.
a few compounds exist whose solubility decreases as the temperature increases. how would the values for deltag deltah
Presume you have 1.00L of an aqueous buffer containing 60.0mol acetic acid pka=4.76 and 40.0mol acetate. Compute the pH of this buffer
a sample of 1.05 g of lead ii nitrate is mixed with 130 ml of 0.106 m sodium sulfate solution. what are the
A NaOH soln of unknown concentration was standardized against KHP. It took 45.78 mL of NaOH soln to completely titrate 1.256 g of KHP. Cal the molarity of NaOH.
How many grams of C2H4 are needed to react with 0.133 moles of H2O?
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