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The heat of combustion of benzoic acid (C6H5COOH) is -3226 kJ/mol at constant volume. When a sample of benzoic acid was burned in a bomb calorimeter having a calorimeter constant of 12.5 kJ/oC, the temperature of the calorimeter (including its contents) rose from 23.18oC to 27.65oC. What mass, in g, of benzoic acid was burned? here is what i did, 3226/122.13=26.41 delta t =4.474 so 4.474*12.5/26.41 =2.12 is the answer 2.12g?
The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and it's normal boiling point is 91degrees C. What is the vapor pressure of BBr3 at 34 degrees C.
What is the percent-yield of H2 in the reaction below when an equimolar mixture of CH4 and CO2 with an initial total pressure of 20.0 atm reaches equilibrium at 1200. K, at which Kp = 3.548 x 106?
When heat and a stream of H2 gas is applied to the sample, the Fe2O3 reacts to form metallic Fe and H2O(g). The Al2O3 does not react. If the sample residue weighs 2.499 g, what is the mass fraction of Fe2O3 in the original sample?
Write a structural formula and a line-angle formula of each isomer of C4H8. Do not include any cyclic structure. Write the IUPAC name of each isomer. Make sure to include the cis- or tran- in the name if applicable.
what is the molar concentraion of the salt solution formed n this reaction? B. what is the molar concentraion of the excess reactant once this reaction has finished?
If Kp = 0.032 at this temperature, what will be the equilibrium overall pressure starting from pure CaSO4(s)?
Assume that the relative yield of the products in your experiment will be proportional only to the numbers of hydrogens that give each product when substituted for by chlorine.
Describe the characteristic infrared absorption frequencies that would allow you to distinguish between the following pairs of compounds.
Then 40.0 mL of this solution were titrated with 0.060 M HClO4. Calculate the pH at the first equivalence point.
A compound containing nitrogen and oxygen is decomposed in the laboratory and produces 1.78 g of nitrogen and 4.05 g of oxygen. Calculate the empirical formula of the compound.
Calculate the kg/h of wet cake feed needed to produce 1000 kg/h of "dry" ?sh cake product.
Describe the effect on pH (increase, decrease, or no change) that results from each of the following additions: (a) potassium acetate to an acetic acid solution,
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