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Using a solution of KMnO4 has a percent transmittance of 27.3 percent when observed in a 1.15-cm cell at a wavelength of 525 nm. Compute the absorbance of this solution.
A cup of brewed coffee is made with 9.0 grams of ground coffee beans. If a student drinks four cups of gourmet coffee a day, how much does the student spend on a year's supply of gourmet coffee that sells for $8.99 a pound
Zinc dissolves in acid according to the balanced reaction: Zn(s) + 2H^+(aq) -> Zn^2+(aq) + H2(g) A sample of zinc is placed in the ice calorimeter. If 0.0657g of zinc causes a decrease of 0.109mL in the ice/water volume of the calorimeter
He was befuddled when he isolated a material with a single 1H nmr signal at 1.64 δ and 13C nmr signals at 123 δ and 18.9 δ . Use epwa to show Bonnie what happened.
Calculate the work associated with the compression of a gas from 121.0 L to 80.0L at a constant pressure
In which of the compounds/ions listed is the octet rule impossible to satisy for all atoms in the formula. Choose "Impossible" or "Possible" in regards to satisfying the octet rule
what is the density of a block of marble that occupies 350 cm3 and has a mass of 660 g?answer in units of
Use an Arrhenius plot to determine the activation barrier for the reaction. Express your answer using three significant figures. (units = kJ/mol)
Write the balanced chemical equation for the combustion of mesitylene. Remember to start with the molecular formula (not the empirical formula).
Consider the reaction 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s). If 12.5 g of iron(III) oxide (rust) are produced from 8.74 g of iron, how much oxygen gas is needed for this reaction?
Magnesite MgCO3 and siderite FeCO3 are the Mg and Fe end-members of the magnesite-siderite solid solution.
Suppose that 0.650mol of methane, CH4(g), is reacted with 0.800mol of fluorine, F2(g), forming CF4(g) and HF(g) as sole products. Assuming that the reaction occurs at constant pressure, how much heat is released
What are the equilibrium partial pressures of CO and CO2 if CO is the only gas present initially, at a partial pressure of 0.988 atm?
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