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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
The expresssion for the freezing point depression of a solution relative to that of the pure solute is shown above. From solutions of known concentrations of p-dichlorobenzene in cyclohexane, you determine Kf, the freezing point depression constan..
The solubility of silver sulfate in water is 0.223% (w/v) at 35°C. Calculate the solubility product of this salt at this temperature
How many grams of Cl2 can be prepared from the reaction of 8.00g of MnO2 an 25.0 g of HCl according to the following chemical equation? MnO2 + 4HCL --> MnCl2 + Cl2 +2H20
What was the temperature change of the metal? C) Calculate the specific heat and the atomic mass of the metal. What is the metal?
Ethane gas, C2H6, burns in oxygen to form carbon dioxide gas and gaseous water. At constant 1.60 kJ of heat is evolved when 79.442 grams of ethane is burned.
Calculate the pH of a buffer solution with .10 moles of C2H5COOH and .13 moles of C2H5COONa in 1.5L
Calculate the concentration of Ca2 at V = 1/2 Ve? Calculate the concentration of Ca2 at V = Ve.? Calculate the concentration of Ca2 at V = 1.1 Ve.?
Nitrosyl chloride (NOCl) decomposes at elevated temperatures according to the equation 2NOCl(g) ->2NO(g) + Cl2(g). Calculate Kp for this reaction at 680°C. (For this reaction ΔH° = 81.2 kJ/mol, ΔS° = 128 J/K·mol)
calculate the mass of calcium carbonate formed when 25 ml of a solution of calcium chloride at 0.10 m react with sodium
Consider a sample that consists of three green spheres and one blue sphere. The green mass is 2.00 g, and the blue mass is 3.00 g. Calculate the fractional abundance of each sphere in the sample.
Glycolic acid, which is a monoprotic acid and a constituent in sugar cane, has a pKa of 3.9. A 25.0 mL solution of glycolic acid is titrated to the stoichiometric point with 35.8 mL of 0.020 M sodium hydroxide solution. What is the pH of the resul..
Consider the titration of a 25.0 -mL sample of 0.105 M HC2H3O2 with 0.125 M NaOH. Determine the pH at 6.00mL of added base, the pH at the equivalence point.
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