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How much heat is required to convert 30.0 g of ethanol at 28 C to the vapor phase at 78 C ?additional info:Ethanol (C2H5OH) boils at 78 C. Its density is 0.789 g/mL. The enthalpy of vaporization is 38.56 kJ/mol . The specific heat of liquid ethanol is 2.3 J/g-K.
Assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts.
A 493 mL sample of solution contains 33.2 g of CaCl2 Calculate the molar concentration of Cl in this solution
The excess I3- was titrated with 50.00 mL of a 0.02000 M Na2S2O3 solution. What was the mass percent of arsenic trichloride in the original sample?
The ache or "burn" you feel in your muscle during strenuous exercise is caused by the accumulation of lactic acid. The hydrogen atom of the COOH group is acidic
classify the solid state of the following substances as ionic crystals covalent crystals molecular crystals or metallic
What is the pKa for the acid HA if a solution of 0.65 M HA and 0.85 M NaA has a pH of 4.75?
What is the pressure of a gas if you compressed the gas from it's original 500mL at 3.4 torr to a volume of 302mL?
Calculating standard enthalpy change, heat, and mass of a reaction, Methanol (CH3OH) is used as fuel in race cars. Calculate the standard enthalpy change for the reaction, assuming H2O(g) as a product.
The reactions represented below are all spoontaneous as written. For each, write the anode and cathode half - reactions and indicate the signs of the electrodes.
a chemist prepares a solution by dissolving 2.228 g of nano3 in enough water to make 200 ml of solution. what molar
Titrate with 0.1005 M NaOH and arrive at an endpoint at 24.20 ml. You know that at the final pH both protons have been titrated. What is the Molar Mass of the acid
What is the value of Kc if the extent of dissociation in 0.100M lactic acid is 3.65% at 25 Degree C?
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