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At a particular temperature the equilibrium constant for the reaction: H2(g) + F2(g) ? 2HF(g) is K = 36.0. A reaction mixture in a 10.00-L flask contains 0.42 moles each of hydrogen and fluorine gases plus 0.15 moles of HF. What will be the concentration of H2 when this mixture reaches equilibrium?
If a sample is composed of 41% of the lighter isotope (with the balance being 7Li), calculate the average molar mass of the sample.
of the solvents used some were very polar e.g. acetone ethanol while others were very nonpolar e.g. hexane. did the
A solution of calcium ions contains 7 meq/250. cm3 of calcium ion. How many moles of calcium ion does this solution contain
The water portion of an adult's total blood supply is about 5 liters. How many grams of oxygen could dissolve in 5 liters of water?
buffer contains 0.50 mol NH4+ and 0.50 mol NH3 diluted with water to 1.0 L. How many moles of NaOH are required to increase the pH of the buffer to 10.00? pKa of NH4+ = 9.25.
What are the poles of the following transfer functions?
What is the pH of a solution of a strong acide like tintric acid, HNO3, which is 5.6 x 10^-4 M? [HNO3 is a strong acide, so it is completly ionized in aqueous solution
The isothermal reversible expansion at room temperature of one mole of an ideal gas from 2L to 3L. (Answer: 3.4 J/K) b. One mole of ice at 265K is melted under usual lab conditions to form water at 329K.
Steel wool wetted with vinegar is sealed within a balloon inflated with air. After several hours, what happens to the volume of the balloon?
How many grams of silver nitrate does it take to react completely with 7 mol Cu?
magnesium hydroxide is 54.87 oxygen by mass.How many grams of oxygen are in 175 g of the compound?How many moles of oxygen is in this.
what is the standard free energy change for thisreaction? Substance ?G°f (kJ/mol) CH3CH2OH(l) - 174.9 O2(g) 0 CO2(g) -394.4 H2O(g) -228.6 Express the free energy change inkilojoules using five significant figures. ?G° = ? kJ
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