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Explain which of the five cobalt complexes, [Co(NH3)5X]^y+ (where X is one of the five ligands, Br-, Cl-, F-, H2O, or NH3 and y is the magnitude of the positive charge) will absorb the shortest wavelength of light? Define which will absorb the longest wavelength of light? Define the oxidation state of Co in each of these complexes?
Copper dissolves in nitric acid, producing copper (ll) nitrate. After reaction with sodium hydroxide and heating, copper nitrate changes to copper (ll) oxide. Calculate the percent yield of this process if 1.075 g of copper produced 1.075 g of cop..
you and another student were each given an unknown compound. both samples contained colorless material. you each used
Calculate the resulting pH if 365 mL of 2.88 M HNO3 is mixed with 335 mL of 1.10 M Ca(OH)2 solution.
Calculate Ecell for the oxidation of Cl(aq) to Cl2(g) by PbO2(s) in an acidic solution. Assume all other reactants and products, except for H+, are in their standard states for the below values. Round your answer to 3 decimal places. Enter scienti..
The element lanthanum has an atomic weight of 139 and consists of two stable isotopes lanthanum-138 and lanthanum-139.
A student adds 8.10 mL of a 0.490 M HCl solution to the beaker. How much will the pH change? The PKa of acetic acid is 4.760.
Gallium-67 is used in nuclear medicine. After treatment, a patient's blood gave a radioactivity of 20,000 counts per minute (counts/min). How long would it be counts before the activity decreased to about 5000 counts/min
Set of quantum numbers listed in the form: (n,l,ml, ms). for each set of quantum numbers, indentify the corresponding orbital (1s, 2s, 3s....etc) if not allowed say not allowed.
How many moles of the nonelectrolyte, propylene glycol(C3H8O2) should be dissolved in 800.0g of water to prepare a solution whose freezing point is -3.73C? For water, Kfis 1.86C m-1 and Kb is 0.51C m-1.
A horse of mass 218 kg pulls a cart of mass 238 kg.The acceleration of gravity is 9.8 m/s2 .What is the largest acceleration the horse can give if the coefficient of static friction between the horse's hooves and the road is 0.842.
72.0 mL of a 1.60 M solution is diluted to a volume of 268 mL. A 134-mL portion of that solution is diluted using 139 mL of water.
A 2.20 g sample of a large boimolecule was dissolved in 13.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
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