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While a 1.150 g sample of iron ore is treated with 50.0 ml of HCl the iron dissolves in the acid to form a solution of FeCl3. The FeCl3 solution is diluted to 100.0 ml and the concentration of Fe3+ ions is determined by spectrometry to be 0.095 mol*L^-1. Explain what is Mass % of iron in the ore?
The half life of polonium-210 is 138.4 days. How many milligrams of polonium-210 remain after 415.2 days if you start with 2.0 mg of the isotope?
A new temperature scale was invented by a scientist named Pat and is called the Patrius scale. On her scale, water froze at 35°P and boiled at 280°P. What Celsius temperature is equal to 150° P?
Calculate the volume in liters of a 8.75x10^-5 M silver (II) oxide solution that contains 200.g of silver (II) oxide
prior to engaging in this discussion please review chapters 6 and 9 read chapter 10 in the text and review any relevant
How long would it take the same number of moles of Ar(g) to effuse through the same membrane?
which one of the following would furnish the highest yield of a methyl ether on reaction with naoch3 under conditions of williamson synthesis?
A sample consisting offive molecules has a total energy 5£. Each molecule is able to occupy states of energy j£,with j= 0,1,2,···,oo. (a) Calculate the weight of the configuration in which the molecules are distributed evenly over the available st..
How many milliliters of .200 m NaOH are needed to neutralize 100.ml of .100 m HCl
For N2 1- draw the molecular orbital energy diagram showing electrons 2- give the molecular electron configuration 3- give the bond order for the molecule 4- predict if the molecule will be magnetic
Nitrogen gas when combined with hydrogen gas forms ammonia gas according to the following equation N2(g) + 3H2(g) = 2NH3(g). Delta H(rxn)=-56 kJ. The delta H(rxn) was determined using Hess's Law and the following three related reactions:
If the pH is buffered at 8.2 (as is historically typical for the ocean), what is the molar solubility of CaCO3? F) If the pH is buffered at 7.5, what is the molar solubility of CaCO3?
Solution A has a hydronium ion concentration of 3.8 X 10-8 M. Solution B has a hydronium ion concentration of 2.5 X 10-4 M. which solution has the larger hydronium ion concentration. and which solution has the larger pH.
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