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If you used 20 ml water to recrystallize salicylic acid at 10 °C, estimate the amount of product that can be lost as a result of dissolving in the filtrate. (solubility at 10 °C =0.14/100 ml water). Calculate the loss if you had used 4 mls of water.
An unknown compound contains only carbon, hydrogen, and oxygen.Combustion of 5.50 of this compound produced 8.07 of carbon dioxide and 3.30 of water.
Assume three significant figures and an average wavelength of 504 nm for solar radiation. A green leaf has a surface area of 2.00 cm^2
Provide some diagnostically useful differences you would expect in the IR spectra between starting materials and product for the reaction you carried out (e.g. if I was asked this regarding the oxidation of cyclohexanol to cyclohexanone
Solid benzoic acid, C6H5COOH(s), is often used to determine the heat capacity of a bomb calorimeter, because the constant volume heat of combustion of this compound is known with high precision: qV = 26.434 kJ/g. When a 2.088 g sample of C6H5COOH(..
9.92 grams of a compound with a molar mass of 124.0 grams/mole when dissolved in 150.0 grams of water gave a solution which had a freezing point of -2.69 °C. Calculate the experimental value of the van't Hoff factor.
What is the mass flow rate of methane into the heat exchanger? 162 kg/min, What rate of heat is supplied to the methane stream in order to heat it from 35.0°C to 75.0°C? 250 kW
A 52.0mL volume of 0.35M CH3COOH (Ka=1.8x10^-5) is titrated with 0.40 M NaOH. Calculate the pH after the addition of 31.0mL of NaOH.
Calculate the volume of a sample of carbon monoxide at -23°C and 289 torr if it occupies 3.65 L at 298 K and 732 torr
Litmus paper is a classic pH indicator. Describe the color change litmus paper undergoes when placed in both acidic and basic solutions
Draw structural and line-bond formulas for all the structural isomers with the formula C4H9Cl. Determine the polarity of each, showing partial changes and the overall direction of the net dipole where applicable.
A sample of pure NO2 is heated to 388C at which temperature it partially dissociates according to the equation.
If your front lawn is 15.0 feet wide and 20.0 feet long, and each square foot of lawn accumulates 1350 new snow flakes every minute, how much snow (in kilograms) accumulates on your lawn per hour?
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