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The addition of PEtPh2 to NiBr2 at -78 degrees Celsius in CS2 gives a red complex with the formula (PEtPh2)2NiBr2 which is converted to a green complex of the same formula on standing at room temperature. The red complex is diamagnetic but the green complex has a magnetic moment of 3.2 B.M. a) Which of these is square planar and which is tetrahedral? State reasons for your choice. b) Rationalize the colors of these complexes in view of your choice.
The mixture is added to 130g of water. If the solution described in the introduction is cooled to 0 degrees celsius, what mass of KNO3 should be cystallize
What is the reciprocal of the linear dispersion. Could the two emission lines of hydrogen, 656.28 nm and 656.10 nm be resolved to the base line with a slit width of 0.010mm. Note that the blaze angle is given in wavelength. Using the balze angle f..
determine the mass of aluminum acetate that can be made if i do this reaction with 125 grams of acetic acid and 275 grams of aluminum hydroxide.
For estimating ozon in the air, a certain volume of air is passed through an acidified or neutral KI solution when oxygen is evovled and iodide is oxidized to give iodine
Find the molcular heat capacity in units. Does the law hold up? Can you distinguish a metallic element from a nonmetal this way. Metalloids
Solid iron reacts with chlorine gas to produce iron(III) chloride. If 10.0 grams of iron reacts with excess chlorine gas and 18.5 grams of iron(III) chloride is produced,
The rate constant of a reaction increases by a factor of 2 when the temperature is increased by 10C above room temperature (25C). Calculate the activation energy for this reaction.
A 45.8 mL sample of a 5.8 M KNO3 solution is diluted to 1.00 L. What volume of the diluted solutions contains 15.0 g of potassium nitrate
Determine the limiting reactant -reaction mixture initially contains no products
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 204.0 Torr at 45.0 °C. Calculate the value of ?H°vap for this liquid. Calculate the normal boiling point of this liquid.
Calculate the calorimeter constant. The enthalpy of combustion of antracene is -7061 kJ/mol.
A critical reaction in the production of energy to do work or drive chemical in biological systems is the hydrolysis of adenosine triphosphate, ATP to adenosine diphosphate ADP as described by ATP
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