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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.
Determine thel volume (mL) required to prepare each of the following: a)20.0 mL of a .250 M KNO3 solution from a 6.00 M KNO3 solution. b)25.0 mL of 2.50 M H2SO4 solution using a 12.0 M H2SO4 solution. c).500 L of a 1.50 M NH4Cl solution using a 10..
The pH of the solution at equivalence was 8.4. At 9.3 mL the pH was 5.3. What is the Ka for this acid? Please show all the work
what is the frequency of the photons emitted by hydrogen atoms when they undergo transistions from n=5 to n=3
A Fraunhofer diffraction pattern is produced from a light sourced of wavelength 580 nm. The light goes through a single slit and onto a screen 1.0 m away. The first dark fringe is 5.0 mm from the central bright fringe. What is the slit width
What is the average current passing through a solution of NiSO4 if 1.25 g of Ni were deposited in 4.07 hours? i = A
The pKa of acetic acid, HC2H3O2, is 4.76. A buffer solution was made using an unspecified amount of acetic acid and 0.30 mol of NaC2H3O2 in enough water to make 1.50 L of solution. Its pH was measured as 4.50 on a meter.
Suppose 18.92mL of Na2S2O3 solution were necessary to titrate the iodine formed from 20.95mL of a 0.0100M KIO3 solution and excess KI, Explain what is the molarity of the Na2S2O3 solution
The initial temperature of the water was 25.4 C and the final temperature of both the water and metal was 36.6 C. If the specific heat "c"
A newly isolated natural product was shown to be optically active. If a solution of 2.0 g in 10 mL of ethanol in a 50 cm tube gives rotation of +2.57 degrees, what is the specific rotation of this natural product
The molar solubility of lead(II) iodate in water is 4.0 ? 10-5 mol/L. Calculate Ksp for lead(II) iodate
a what is the concentration of baoh2 in abaoh2 solution if the ph is 8.25?b what is the concentration of ammonium ion
A solution was prepared by dissolving 432 mg of K4Fe(CN)6 in water and diluting to 1.5L. Calculate the K+ concentration in ppm
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