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Why is it necessary to remove the stopper from a reparatory funnel when liquid is being drained from it through the stopcock?
Draw electron dot structure for the following molecules or ions notes En (electronegativity of Sb, Se, CL O are 1.9, 2.4, 3.0 respectively (a) SbCL3 (b) SeOCL2 (c) BF4- (d)C2H5CL
Using active extraction (changing the polarity) and gravity filtration to remove a component, describe how you would obtain pure naphthoic acid from this mixture.
Two 20.0-g ice cubes at -18.0 °C are placed into 295 g of water at 25.0 °C. Assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts.
What is the wavelength (in nm) of the line in the spectrum of the hydrogen atom that arises from the transition of the electron from the orbital with n =3 to the orbital
What is the brand name of Naproxene? Naproxen is said to be the first NSAID marketed in an enantiomerically pure form. What is a NSAID? What is an enantiomer?
at 600 degrees c the equilibrium constant for the reaction 2hgos --gt 2hg l o2 g is 2.8. calculate the equilibrium
Set up the problem by listing the reactions unknowns equations and knowns b.) Calculate the concentrations of all chemical species present in the solution, and the pH.
What approaches do we use to treat the inter electron repulsion part of the Hamiltonian for multi-electron atoms including helium and beyond.
How is the half-life of a first-order reaction effected by the concentrations of the reactants?
a) Gaseous Cl2 in the stratosphere to form gaseous Cl atoms. b) Gaseous CO reacts with gaseous H2 to form liquid methanol, CH3OH. c) Calcium phosphate precipitates upon mixing Ca(NO3)2(aq) and (NH4)3PO4(aq).
Changes in atmospheric concentration of carbon dioxide during periods of artificial lighting (non-shaded) and darkness (indicated by grey shading). (b) Changes in oxygen concentration for a stand of soybean plants grown in a biomass chamber
What is the basis for signal generation in this technique (i.e., describe how and what signal is measured by the scanning probe electronics)
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