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Suppose you burn exactly 1.50g of benzoic acid, C6H5CO2H, in a combustion calorimeter and find that the temperature of the calorimeter increases from 22.50 to 31.69°C. The calorimeter contains 775 g of water, and the bomb has a heat capacity of 893 kJ/K. How much heat is evolved per mole of benzoic acid? Show all calculations
cindy an overweight high school student is overheard telling her friend that shes going to research how she can
how efficient is the extraction of the tea leaves containing 1.0 g of caffeine with the two 3 ml portions of chloroform
A solid that weighs 0.008kg . Put the solid into a gradulated cyliner filled with water and the volume increases by 10cm 3 what is the denity?
molar mass has the units of gramsmole. molar mass serves as a conversion factor between numbers of moles and mass. if
2816 g sample of KHP required 29.68 ml of sodium hydroxide to reach the phenolphthalein point. calculate the molarity of the NaOh solution.
Propose a mechanism to account for the formation of a cyclic acetal from 4-hydroxypentanal and one equivalent of methanol
Calculate the molar solubility of BaCO3 in a 0.10 M solution of Na2CO3 (aq). Ksp (BaCO3) = 8.1 x 10^-9
Calculate the energy released (per mole of deuterium consumed) for the following fusion reaction, 2/1 H + 3/1 H -> 4/2 He + 1/0 n given the following molar masses of nucleons and nuclei
Express the concentration of a 0.0620 M aqueous solution of fluoride, F-, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.
what are the goals of this project. please answers have to be related to chemistry and specifically to this experiment.
Which salts are more effective for cold and hot packs, KNO3, NH4NO3, MgSO4, CaCl2, MgCl2? which are most cost effective? Maximum and minimum T for both?
Assume the H atom oscillates toward and away from the I atom and that force constant of the HI bond is 314 N m^-1 , bond is 161pm. calculate (a) vibrational frequency of the molecule and (B) the wavelength required to excite the molecule into vibr..
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