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What is the mole fraction of ethanol, CH3CH2OH, in an aqueous solution that is 20.0% ethanol by mass?
0.150
0.144
0.0980
0.0892
0.208
The Henry's Law constant (k) for carbon monoxide in water at 25ºC is 9.71 x 10-4 mol/(L•atm). How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 atm?
water from 20 degrees Celsius to 100 degrees Celsius. What is the delta H of combustion of the propane. What is the sign (positive or negative) of delta H?
The individual standard electrode potentials do not indicate anything about tendency to gain electrons. The cell potential of the entire cell does.
Determine pH of the solution....ICE table..Henderson HasselBach equations, Using a ICE table (initial change equilibrium) a)Calculate the pH of solution that is 0.175M in acidic acid(HC2H3O2) ans 0.110Min potassium Acetate(KC2H302)
Calculate the pressure when the volume is 1.27 L and the temperature is 3.00 × 102 K.
similarly, what happens if cellulose is reacted with maleic anhydride C4H2O3? Again, how is the cellulose molecule/structure altered and what are the reaction by-products?
A 300 mL stock solution contains 0.9 M Ca(CN)2. When 100 mL of the stock solution is diluted to 120 mL, how many moles of CN- ions will be contained in the dilute solution.
Is the reaction exothermic or endothermic? b) Calculate the heat produced when 10.0 g of AlCl3 forms. c) How many grams of Al are required to produce 1.00 kJ of energy?
Each polypeptide in the alpha keratin dimer has 3.5 residues per turn, resulting in the slight winding, or twist, around the other polypeptide
the hydrated radius of hemoglobin is found to be 3.55 nm. How many water molecules hydrate a hemoglobin molecule?
A gas sample was collected over water at 25.3 0C. The total pressure is determined to be 0.97 atm. What is the partial pressure of the gas that was collected?
How much heat is evolved when 265 g of ammonia gas condenses to a liquid at its boiling point
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