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What is the resonance structure that best describes the overall structure of the SNO+1 ion?
hydrogen and nitrogen have different molecular weights, so mass fractions will be different than mole fractions.
How many moles of ammonia are produced when 20 moles of hydrogen react with 40 moles of nitrogen
aluminum oxide decomposes to produce aluminum metal and oxygen gas. When 9.8g of aluminum oxide decomposes, how many grams of aluminum are produced?
A NaOH solution that is 18.1M, has a density of 1.250 g/ml. What is the molality? Mass Percent? and Mole Fraction?
Calculate the maximum number of moles and grams of H2S that can form when 152 g aluminum sulfide reacts with 147 g water.
A sample of calcium carbonate absorbs 45.5 J of heat upon which the temperature of the sample increases from 21.1 degrees celcius to 28.5 degrees celcius.
a solution is prepared by dissolving 396 grams of sucrose in 624 grams of water. what is the vapor pressure of this solution at 30 degrees celsius.
Given the following data H Cl bond enthalpy = +431 kJ/mol, ?Hf HCl(g) = -92.31 kJ/mol
What would the molar concentration of the tree sap have to be to achieve this pressure on a day when the temperature is 28?
The lead contained in a 0.2000 g sample is precipitated as PbCrO4. The precipitate is filtrated, washed and re-dissolved in acid to give lead ions and dichromate.
What is the work done by the copper bar on the surrounding atmosphere? The density of copper at 20 degree celsius is equal to 8920 kg/m3.
How many liters of flouridated drinking water would a 70 kg person have to consume in one day to reach this toxic level? How many kg of sodium flouride would be needed to treat a 7.49x 10^6 -gal reservior?
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