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At 720 degress celcius the KC for the reaction N2 + H2 <--> NH3 is 2.37X10-3 in certain experiment the eq. concentration are (N2)= 0.683M, (H2)= 8.80M, (NH3)= 1.05 M. Suppose the NH3 is raised
In 2008, carbon dioxide levels at the South Pole reached 385 parts per million by volume. (The 1985 reading was 314.6 ppm by volume.) Convert the 2008 reading to a partial pressure (in bar). A
Of the following anions, Br-, CO32-, Cl-, I-, NO3-, NO2-, PO43-, SO42-, SO32-, list those ions that meet the following criteria: Is involved in an oxidation-reduction reaction as part of a confirma
A solution of sodium nitrate, NaNO3, in water is 5.181 molar and its density is 1.2680 g mL-1. Calculate the percent, by weight, of sodium nitrate in the solution.
Molecular formula of nicotine which an empirical formula of c3h7n and molecular weight of 162g/mole
Describe the glassware and the technique you would use to take part of a sample of a solution of concentration 1.00 and make it into a solution of concentration 0.250.
toxic chemicals in drinking water usually are reported and a safety level specified in units of parts per million (ppm) by mass. what is the molar concentration of arsenic in a water sample that has
At 90 degree celsius, the vapor pressure of acetic acid is 293 mmHg and its vapor pressure at 100 deg. celsius is 417 mmHg. calculate the normal boiling point of acetic acid.
Liquid sodium can be used as a heat transfer fluid. It's vapor pressure is 40.0 torr at 633 degrees C and 400.0 torr at 823 degrees C. Calculate its heat of vaporization.
When aqueous solutions of lead(II) ion are treated with potassium chromate solution, a bright yellow precipitate of lead(II) chromate, PbCrO4, forms. How many grams of lead chromate form when a 1.80
If a solution of naoh is standardized using a sample of khp which is contaminated by kcl, how would the molarity of NaOH calculated be affected? would the molarity of NaOH be too high or to low?
Calculate the number of moles of H2O formed when 0.200 mole of Ba(OH)2 is treated with 0.500 mol of HClO3 according to the chemical reaction shown below.
What is the chemical equation, name, and formula for the follwing? "When strongly heated, magnesium sulfide formed a yellow crystalline deposit on the walls of a sealed reaction vessel. Metallic dep
The number of moles of electrons transferred in the equation representing the reaction is 1.00 mol. Calculate the standard cell potential Eo for a voltaic cell utilizing this reaction under standard
A voltaic cell is constructed by immersing a strip of sillver metal in a 1.0 MAgNO3 solution and a strip of cadmium metal in a 1.0M Cd(NO3)2 solution. The circut is completed by a wire and a salt b
Calculate the free energy at 25 for the nonstandard conditions at point B where the reaction quotient Q is 3.58*10^9 . Express your answer numerically in kilojoules per mole.
In a reaction, 30.3 g of chromium(III) oxide reacts with 10.8 g of aluminum to produce chromium and aluminum oxide. If 20.7 g of chromium is produced, what mass of aluminum oxide is produced?
Sodium carbonate () is used to neutralize the sulfuric acid spill. How many kilograms of sodium carbonate must be added to neutralize 5.04×103 of sulfuric acid solution?
The molar enthapy of fusion for water is 6.008 kJ/mol. Calculate the molar enthapy of vaporization of a substance if 0.652 mol of the substance absorbes 6.411 kJ when it melts
If solid PbCl2 and PbF2 are placed in equal amounts of water in seperate beakers, in which beaker is the concentration of Pb+3 greater? Equilibrium constants for these solids dissolving water are as
How many kilocal are required to increase the temperature of 15.6 g of iron from 122 °C to 355°C? The specific heat of iron is 0.450 J/g °C.
If you dilute 30.0 of the stock solution which has a volume of 20.4 ml to a final volume of 0.480, what will be the concentration of the diluted solution?
Calculate the Ksp of lead iodide from the following standard electrode potentials, at 25 °C: 2 e- + PbI2(S) ⇔ Pb(s) + 2 I-(aq) E° = -0.365.
Malic acid is a compound that contains only carbon, hydrogen, and oxygen. Combustion of 2.000 g malic acid produces 0.8062 g H2O and 2.626 g CO2. What is the empirical formula of malic acid?