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Ethanol melts at -114C and boils at 78C. It's density is 0.789 g/mL. The enthalpy of vaporization is 38.56 kJ/mol, and its enthalpy of vaporization is 38.56 kJ/mol. The specific heat of solid liquid ethanol are 0.97 J/gK and 2.3 J/gK, respectively. How much heat is required to convert 25.0g ethanol at 25C to the vapor phase at 78C? How much to convert 5.00 L?
What is the molarity of a solution of 14.0 g NH4Br in enough H20 to make 150 ML of solution.
A chemist wanted to determine the concentration of a solution of lactic acid, HC3H5O3. She found that the pH of the solution was 2.59. What was the concentration of the solution.
50.50 mL of 0.116 M HF is titrated with 0.1200 M NaOH. How many mL of the base are required to reach the equivalence point? (Ka for HF is 6.8 x 10-4)
What is the temperature at which the solution of KI will freeze if the solution contains 52.43 grams of KI dissolved in 479.1 grams of water.
Compute the atomic mass of 109Ag if natural abundance of 107Ag is 51.87% & atomic mass =106.905 amu and determine the probability of particle would be located in the range
Assuming the earth is a perfect sphere with a radius of 6371 km and an atmosphere that extends from the surface to an altitude of 20 km determine the number of metric tons of the elements/compounds+
You have a 1 L. container of a gas O2 at 20 degrees celcius and 1 atm. subtracting the weight of the container, what is the mass of the gas?
The half-life for a first order reaction at 550 oC is 85 sec. How long it would take for 23% of the reactant to decompose?
explain the earodynamics characteristics of margarine firmness and coefficient of friction important in agricultural engineering research and development.
An unknown, rectangular substance measures 3.6 cm high, 4.21 cm long, and 1.17 cm wide. If the mass is 21.3g, what is this substance's density?
What is the pH of a buffer that consists of 0.45 M CH3COOH and 0.35 M CH3COONa? Ka = 1.8 × 10-5
Garlic smell is easily noticable due to the compound that is responsible for this is Allicin , when we analysed this compaound and find out molecular formula of molar mass= 486 grams
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