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Amphetamine (C9H13N) is a weak base with a pKb of 4.2. Compute the pH of a solution containing an amphetamine concentration of 219 mg/L.
at room temperature 20circ rm c milk turns sour in about 63 hours. in a refrigerator at 3circ rm c milk can be stored
1,10-Phenanthroline forms a bright red complex with iron(III). The complex has an analytical wavelength of 510 nm and has a high molar absorptivity. Hydroxylamine hydrochloride is added to keep the iron in a reduced +2 state
the pressure of a sample of gas at 10.0 c increases from 700. mm hg to 900. mm hg. what is the new
Cabernet Sauvignon with a pH of 3.64. How many times more acidic is the Sauvignon Blanc? Please show work thoroughly and answer both questions.
An alkaline earth metal, M, combines with a halide, X. Will the resulting compound be ionic or covalent? Why? What is the Lewis structure for the compound
Determine how many grams of solute would separate if the quantity of the solvent is 129 grams if a saturated solution of ammonium nitrate at 75 °C is cooled to fifteen degree Celsius?
A gas expands from 360. mL to 971 mL at constant temperature. Calculate the work done (in joules) by the gas if it expands against a vacuum.
what is the molarity of a solution containing 16.0 rm g of rm kcl in 324 rm ml of
A system expands in volume from 2.0 L to 24.5 L at constant temperature. Calculate the work (w) if the expansion occurs against a constant pressure of 5.00 atm.
Why is molality used in the equations describing freezing-point depression and boiling-point elevation? Explain in detail and explain the reason why molarity is nto used.
Atoms, such as sodium, typically give line spectra, as opposed to continuous spectra. Given that such spectra are due to changes in the energies of electrons, explain, using a suitable diagram, what this tells you about the electronic structure of..
We could find out more information about ths reaction by studying the temperature dependence of the rate constant, k. These same experiments could be carried out at a lower temperature (ice bath) and a second rate constant, k2 could be determined ..
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