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In art of the Ancient Near East (Assyrian Art), sculptures often had carved eyes accented with shells set in bitumen, a black tar-like substance. Chemical analysis of bitumen by using a combustion reaction yields 6.575 g CO2 and 1.346 g H2O.
a. What is the empirical formula for bitumen (CxHy)?
b. The molecular weight of CxHy is 78.1134. What is molecular formula?
A coal containing 81% C, with a calorific value 32,400 kJ/kg is burnt to produce a flue gas of the following composition: CO2=10.4%, CO= 1.4%, O2= 5.5 % and the rest is nitrogen. Determine the carbon converted to CO per kg coal.
The Ka for a weak acid, HA is 1.6x10^-6. What are the pH and the degree of ionization of the acid in a 10^-3 M solution. Also calculate pKa and pKb.
The next 6 questions involve the calculation of concentrations of the molecular and ionic species in an aqueous solution that has an analytical composition of 0.060 M KH2PO4 + 0.460 M K2HPO4.
determine the solubility of iron in mgl as fe in a solution in equilibrium with feoh3 s ironiii hydroxide 10-2m total
if a solution 110 mL HBr has unknown concentration and is titrated with 80 mL of .150 M NaOH base soultion. Calculate the concentration of the HBr solution.
If the anhydrous compound (AC) in the preceeding problem has a molar mass of 160g/mol, what are the water crystallization (X) and formula for the hydrate
How much heat (in kJ) is evolved in converting 1.00 mole of steam at 145 C to ice at 0 C)? (The heat capacity of ice is 2.09 J/g C and the heat of vaporization of water is 32.9 kJ/mol)
Measurements also show that a certain sample of the unknown compound contains 9.8 mol of oxygen and 3.31 mol of chromium.
Recall from the prelab the enthalpy of vaporization of isobutane. Isobutane is the fuel used in disposable lighters. The lighters' operation is dependent upon the butane's ability to vaporize and be ignited, and this depends somewhat upon the larg..
describe how you would prepare 1.00l of 0.75 m barium hydroxide solution starting with 6.00 m barium hydroxide
What total volume of ozone measured at a pressure of 29.0mmHg and a temperature of 234k can be destroyed when all of the chlorine from 16.5g of CF3Cl goes through ten cycles of the above reactions?
A sample of neon effuses from a container in 79 seconds. The same amount of an unknown noble gas requires 161 seconds.
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