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1. The [OH-] of a solution is 3.6 x 10-4 M. What is the [H3O+] ? Is the solution acidic, basic, or neutral ?
2. What is the correct molecular formula for the structure : Br-CH2-CH-OCH3-CH3
3. Identify the buffer system from the following acid-base pairs: a. HCL and Cl- b. H2CO3 and OH- c. HNO3 and NO2- d. H2CO3 and HCO3-
Calculate the number of grams of alcohol present in 1.00 L of 78 proof gin. The density of ethanol is 0.798 g/mL.
At 50 degrees C, the value of pKw (the dissociation constant for water) is 13.262. Calculate the pH of water at this temperature.
The wavelength ranges corresponding to each color of light are approximate: red, 700-620 nm; orange, 620-590 nm ; yellow , 590-570 nm; green, 570-500 nm; violet, 450-400nm. You have drawn the absorption spectra for the solution containing 5.0, 6.7..
16 grams CH3OH is dissolved in 27 grams of water at 30 degrees celcius. given that vapor pressure of water at 30 degrees celcius is 31.82mm Hg.
Determine which H atom transition (ninitial,nfinal) was responsible for the emission of a photon with a frequency of 6.91 x 1014 Hz.
When a 2.00 g sample of RbBr is dissolved in a calorimeter that has a total heat capacity 0.6306 kJ*K^-1, the temperature decreases by 0.420 K. Calculate the molar heat of solution of RbBr.
A 1.80-g sample of a large biomolecule was dissolved in 21.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C
Sulfuric acid is a component of acid rain formed when gaseous sulfur dioxide pollutant reacts with gaseous oxygen and liquid water to form aqueous sulfuric acid.
Dinitrogen tetraoxide, N2O4, decomposes to nitrogen dioxide in a first-order process. If k=2.5 x 10 to the 3rd s-1 at -5degrees C and k=3.5 x 10 to the 4th s-1 at 25 degrees C, what is the activation energy for the decomposition?
How many grams of F2 are needed to produce 237 g of PF3 if the reaction has a 80.4% yield?
In an adiabatic compression if one mole of an ideal gas with a Cv=5R/2, the temperature rises from 293 K to 325 K. Calculate the heat, work, change in enthalpy and change in internal energy
The formula needed to solve this problem. Calculating equilibrium concentrations of all three substances: N2(g) O2(g) (equilibrium arrows) 2NO
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