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Calculate the weight and volume of oxygen required for the complete combustion of 3 kg of fuel containing 75% C, 10% H, 10% O, 2% S, 2% N and remaining ash?
Liquid hexane, C6H14 burns in oxygen gas to yield carbon dioxide and water. What is the minimum mass of oxygen required for the complete reaction of 10mL of hexane. (density of hexane = .660g/mL)
Explain why the salt of a weak acid, as well as the acid itself, must be present to form a bu?er solution.
Question- Calculate the number of moles of HCl(aq) that must be added to 2.00 L of 1.00 M NaC2H3O2 to produce a solution buffered at a pH of 4.20. The pKa for acetic acid is 4.74.
For each of the following states described in the following list, calculate the final pressure, as well as q, w, ?U, and ?H. a) the gas is expanded isothermally and reversibly until the volume doubles
To what volume should you dilute 44.0 mL of a 4.60 M KI solution so that 28.5 mL of the diluted solution contains 3.65 g of KI
What is the pH at the equivalence point? the Ka of hydrofluoric acid is 3.5x10^-4.
How many milliliters of a 305 mL solution of 1.5 M AlCl3 must be used to make 75 mL of a solution that has a concentration of 0.41 M Cl
methane ch4 has a tetrahedral structure similar to that of si02 with a carbon atom of radius 0.77x10-8 cm at the center
A 5.0 gram sample of tea was extracted with 200 mL of boiling water for 2 minutes. Caffeine from 2.0 mL of the above tea, after solid phase extraction, was diluted to 50. mL with the mobile phase. 10uL of the sample extract upon injection gave an ..
Squalene is an important acyclic hydrocarbon whose molecular formula is C30H50. How many pi-bonds does squalene have. explain and show calculation
How many moles of MgCl2 are needed to prepare 25 mL of a 1.49 M MgCl2 (aq) solution in a volumetric flask
What volume (in milliliters) of 0.250 M NaOH should be added to a 0.120 L solution of 0.023 M glycine hydrochloride
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