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a compound that contains only nitrogen and oxygen is 30.4% N by mass; the molar mass of the compund is 92g/mol. what is the empirical formula and molecular formula of he compund?
Calculate the percent yield if the actual yield of aluminum oxide is 0.423mol.
vinger contains 5.0 g of acetic acid, CH3COOH,in 100.0 mL of solution. Calculate the molarity of acetic acid vinegar?
If the volume of ocean water is 5.4*10^20 contains 4.1 percent sodium chloride ("salt") by mass and the density of the water is 1.86 g/mL.
18.6 grams of a solute with moecular mass of 8940 grams are dissolved in enough water to make 1.00 dm^3 of solution at 25 ^0C. What is the osmotic pressure of the solution?
lead poisoning in children used to be treated with intravenous injections of EDTA. If the concentration fo EDTA in the blood of a patient is 2.55 x 10^-8 M and the formation constant for the complex, [Pb(EDTA)]2-, is 2.00 x 10^18
A) Draw the major organic product obtained when 1,2-dimethylcyclohexane-1,2-diol encounters periodic acid.
A lungful of air (500 mL) contains 4.1% CO2 by volume. How many grams of KO2(s) is needed to remove the CO2 from a lungful of air at STP according to the following reaction?
benzoic acid in water is 6.8g per 100ml at 100 degrees c, and .34 per 100ml at 25 degrees c. calculate the minimun volume of water needed to dissolve 1.00g of benzoic acid.
A sample of gas originally at 37.2oC and 1.25 atm pressure in a 3.4 L container is allowed to expand until the pressure is 0.73 atm and the temperature is 14.9oC.
Choose a more convenient order. (b) Calculate q, w, deltaU, deltaH, and deltaS when the gas changes between the same two conditions
For a solution having 1 x 10-3 equivalents/liter total alkalinity (contributions from HCO3-, CO32- and OH-) at [H+]=4.69 e-11, what is the percentage contribution to the alkalinity from CO32-
Given the following data table of average bond enthalpies, estimate the ΔH^rxn for the reactions 2H2+O2-- 2H2O. What is the hybridization of xenon in each of your Lewis resonance structures?
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