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Question- How many kj of heat are required to vaporize 50.0 g of ethanol (C2H6O)? The boiling point of ethanol is 78. 3 C. It's molar heat of vaporization is 38.6 kj per mole.
I need help for above question. Show each steps for the above problem.
a mixture with 75% R and 25% S has an optical rotation of -30. what is the optical rotation of pure R?
A solution is made by combining 15.0 mL of 18.0 M acetic acid with 5.50 g of sodium acetate and diluting to a total volume of 1.50 L. Calculate the pH of the solution.
the degradation of limestone by acidic rainwater follows 1st order kinetics with a t12 of 4500 days. calculate the
how to balance the chemical equation of aluminum and hydrochloric
A solution of ammonia and water contains 3.00×1025 water molecules and 5.10×1024 ammonia molecules. How many total hydrogen atoms are in this solution?
Assume that the amino acids with ionizable side chains have the following pKas: Asp 3.65; Glu 4.25; His 6.0; Lys 10.53, Arg 12.48; Cys 8.18; Tyr 10.07. Also Assume that the a-amino group has a pKa of 9.62, and the a-carboxyl group has a pKa of 2.3..
A compound composed of sulfur and fluorine is found to contain 25.24% by mass of sulfur. If the molar mass of the compound is 254.11 g/mol, what is its molecular formula?
The concentration of Pb2+ in a solution saturated with PbBr2(s) is 2.14x10^-2 M. Calculate Ksp for PbBr2.
what mass of PbSO4, is produced when 25.0 Ml of 0.2338M Pb(NO3)2 solution is added to 25.0 mL of 0.0971M Al2(SO4)3 solution,
Problem- A. At constant T and P, the direction of spontaneous change is the direction of increasing free energy. B. Free energy is the energy in a system that is available to do work.
Write the reactions for the preparation of the diaonuim salt for the coupling of the salt with the sodium salt of 2-napthol.
A standard addition procedure is used to determine the concentration of F- (in ppb) in a water sample. To four 6.00 mL aliquots of a water sample were added 0.00 mL, 1.50 mL, 2.50 mL, and 3.50 mL of a standard NaF solution containing 12.0 ppb
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