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Calculate the equilibrium concentrations if the initial concentrations are 2.31 M N2 and 0.59M O2 . (This N2/O2 concentration ratio is the ratio found in air.)
He 1.00 L at 300. torr, Ne 1.00 L at 0.527 atm, Ar 2.00 L at 45.0 kPa. Assuming the connecting tubes have negligible volume, what is the partial pressure of each gas and the total pressure after all
Occurring at 800 K and 1atm. The initial mixture contains 1 mol of SO2 and 0.5 mol of O2. The reaction mixture can be considered to be an ideal gas. Calculate the equilibrium constant for the reacti
The freezing point of ethanol (C2H5OH) is -114.6 degrees C and the molal freezing point depression constant for ethanol is 2.00 degrees C kg mol-1. What is the freezing point (in C) of a solution pr
If you began with 11.5 mL of 0.47 M NaHCO3, how many mL of your choice from above would you need to add to get a pH 7 buffer?
In step 1 of the experimental procedure, copper metal is added to concentrated nitric acid. The reaction between copper metal and concentrated nitric acid is an oxidation-reduction reaction that is
At 25 degree C the heat of fusion of Al is 10.6 kJ/mol and the heat of sublimation is 326.4 kJ/mol. What is the heat of vaporization of Al at 25 degree C.
A 50.0 mL sample of vinegar (density = 1.06 g/mL) was diluted to 500.0 mL. Titration of a 50.0 mL aliquot of this solution required 42.5 mL of 0.0900 M NaOH to reach the end point. Deter
Calculate the molarity of the following solutions:
Assume that the density of the solution is 1.00 g/cm3. Calculate the mass percent, molarity, molality, and mole fraction of NaCl.
The decomposition of potassium chlorate (KClO3) is used as a source of oxygen in the laboratory. How much potassium chlorate is needed to produce 20.7 mol of oxygen?
According to the ideal gas law, a 10.0 mol sample of methane gas in a 0.815 L container at 503 K should exert a pressure of 506 atm. By what percent does the pressure calculated using the van der Wa
In a combustion reaction 4 moles of C8H18 react with 8 moles of O2. If the actual yield of CO2 produced is 28.16 grams, what is the percent yield?
A 350.0 mL sample of oxygen gas was collected over water at a temperature of 25.0ºC and 740.0 mm Hg. How many moles of gas were there in this sample if the vapor pressure of water at 25.0º
What is the final volume in milliliters when 0.780 of a 39.7 (m/v) solution is diluted to 25.0 (m/v)? Express your answer numerically in milliliters.
The vapor pressure of pure water at 25 °C is 23.8 torr. What is the vapor pressure (torr) of water above a solution prepared by dissolving 11.5 g of glucose (a nonelectrolyte, MW = 180.0 g/mol)
Determine the gram-formula mass of the product of this reaction. Include proper units.
Jacob couldn't find the 6 M H2SO4, so instead substituted the 6 M HNO3 that was available. what change was most likely observed as a result of this decision?
The first billiard ball completely stops and the second one rolls away with a velocity of 4.0 m/s. Assume the first billiard ball is the system. Calculate w and q for the process.
Hydrogen gas is produced when zinc reacts with sulfuric acid: If 162 of wet is collected over water at 24 and a barometric pressure of 739 , how many grams of hydrogen have been consumed? (The
If 50 kJ of heat are given off by a chemical reaction in aqueous solution and all the heat is absorbed by the surrounding water, what are the numerical values of:
How many moles of oxygen are combined with 4.20 moles of chlorine atoms in C2O7?
Calculate the pH of a solution prepared by mixing 250. mL of 0.174 m aqueous HF (density = 1.10 g/mL) with 38.7 g of an aqueous solution that is 1.50% NaOH by mass (density = 1.02 g/mL).
Vitamin C (L-ascorbic acid; MW = 176.0 g/mol) is a weak acid (pKa = 4.863). Suppose a 500.0 mg tablet is dissolved in water and titrated with 0.100 M NaOH. How many mL of NaOH are required to reach
Write an equation that shows the formation of the chloride ion from a neutral chlorine atom.