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Into a 5.0 liter flask was placed 35.7 g of PCI5 . The flask and contents were heated to 250 0 C, and then held at temperature.
Discussion on Interspecific Competition.Name another type of interspecific competition besides exploitative and interference competition
The only possible ions in an aqueous solution are ion, barium, carbonate, chloride and nitrate.
When iron is oxidized in the presence of nitric acid, three products are formed: iron(III) oxide, nitrogen dioxide and water.
Explain the dynamics of population growth on the environment. Explain the concept of regulation of population growth through
A weak acid has a PKa of 7.713. Calculate the pH of a solution in which the ratio of the concentrations of undissociated acid to acid anion ([HA]/[A-]).
What is the importance of introducing wolves or other large predators into ecosystems? Is this a good idea? Why or why not?
Calculate the pH of a solution in which the ratio of the concentrations of acid anion to undissociated anion ([A-]/[HA]) equals 7.555.
How do storms, diseases, and predators affect coral reef communities? What are the similarities and differences in their effects?
The gaseous hydrocarbon acetylene, C2H2, is used in welders torches because of the large amount of heat released when acetylene.
Explain why the issue of Global warming effects on the ecosystem is a good topic to study.
Is it possible to calculate concentration of a solution, OH- concentration, and H+ concentration from just a pH given (no specific base or acid)?
Why are birds often selected indicator species? A. They react to change quickly. B. They're high on the typical chain.
A diprotic acid, H2A, has the following ionization constants: Ka1 = 1.1E-3 and Ka2 = 2.5E-6. In order to make up a buffer solution of pH 5.8.
Calculate the pH of the 0.20 M NH3 and 0.15 NH4Cl buffer. What is the pH of the buffer after the addition of 10.0 mL of 0.10 M HCl to 57.5 mL of the buffer.
Corporations and sustainable businesses.As an aspiring applied anthropologist, I have opted to try and come up with a convincing theory
After determining the rate of occurrence, break the occurrences down into age groups, race, and sex.
A reacts spontaneously with 1mol/L BNO3, 1mol/L D(NO3)2 and dilute sulfuric acid.A does not react with 1mol/L C(NO3)2.
A buffer solution is made of 0.100 M HOCl and 0.250 M NaOCl. What is the pH of the resulting solution when a 15.0-mL portion of 0.200 M HCl is added to 100.0 mL
Peony may have evolved to cover the bud with the waxy coating.Why the peony may have evolved to cover the bud with the waxy coating?
If equal molar amounts of Na2HPO4 and NaJpo4 are mixed in water, calcuate the resulting pH. The pKas of phosphoric acid are 2.1, 7.2, 12.4.
Habitat and environmental variations.Direct climate affects on species, For example, the birds being added to the endangered list
Which is the correct order of increasing (from least to most reactive) activity for these metals?
Explain how physical and chemical laws affect a living organism. Explain ow an organism has evolved to adapt to its physical or chemical environment.
With a Ka = 5.8 x 10^-10 it is a weak acid that behaves as a monoprotic acid. Assume you titrate 20.0 mL of 0.11 M boric acid with 0.100 M NaOH. (Show work)