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Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of KOH required for precipitation to begin in each case.
1) 2.0×10-2 M CaCl2 [KOH]=?
2) 2.1×10-3 M Fe(NO3)2 [KOH]=?
Talc (used in talcum powder) has masscomposition 19.2% Mg, 29.6% Si, 42.2% O,and 9.0% H. What is the empirical formula of the compound
determine the activation energy (in kJ/mol) for the reaction. Note that the reaction is "3/2" order in CH3CHO so k has the units of 1/M1/2 s. Strategy: consider the Arrhenius equation written as a linear equation.
The compound below is treated with chlorine in the presence of light. Draw the structure for the (organic) species produced by reaction of the compound with a chlorine atom. Assume reaction occurs at the weakest C-H bond.
If yeast were supplied with glucose labelled with 14C at the C-1 position to produce ethanol and CO2 anaerobically, would the label appear in the CO2
the density of milk is 1.04 g/ml, how many milligrams of milk are in 0.50 qt of milk? (1L=1.057 qt, 1000g=1Kg, 1000ml=1L, 1000mg=1g)
Acid-catalyzed dehydration of an alcohol most closely resembles an E1 mechanism when secondary and tertiary alcohols are involved.
What mass of iron would be required to cover a football playing surface of 120 yds × 60 yds to a depth of 1.0 mm?
What is the density of a substance if a 2.50mL sample has a mass of 0.880g at room temperature? ( show calculations) What is the specific gravity of the substance?
What fragmentation would give rise to the peak at m/z 45 in the Mass Spectrum. Loss of hydroxyl group.
Calculate the concentration of H3O+, OH-, NH4+, and NH4+, and NH3 in 1.00 x 10-6 M NH4Cl solution. Kw = 1.00 x 10-14 and K = 5.52 x 10-10 for NH4+ H2O ?=? NH3 + H3O+.
A polluted water sample is suspected of being contaminated with one of the following; soap, ABS Surfactant, or LAS. In soft water, the sample has a very high BOD relative to its TOC.
Why is a diffraction pattern generated by an electron beam formed by electrons interfering with themselves rather than with one another
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