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What are the differences between alkenes and alkynes? What are the differences between cis- and trans-isomers? How are cistrans isomers used for night vision? What is a haloalkane? Identify one of them. How does it function as an anesthetic? Describe in detail.
A first-order reaction has a half-life of 55.0 min at 25 ºC and 6.8 min at 100 ºC. What is the activation energy for this reaction
what mass of water would you need to evaporate from your skin in order to dissipate 1.7 x 105 j of heat from your body?
Ionization energy of hydrogen atom is the energy required to remove this lone electron from a hydrogen atom. It effectively is the same as moving the electron from
Louis de Broglie won the Nobel Prize in 1929 for his discovery that the characteristic wavelength of an electron is inversely proportional to its linear
If 5.40 mol calcium carbide (CaC2) reacts with an excess of water, how many moles of acetylene (C2H2) will be produced?
What us the pH at the equivalence point for the titration of 0.2 M nitrous acid by 0.2 M sodium hydroxide. Ka for nitrous acid is 4.5 x 10^-4
Iron reacts with HCl solution to give H2 gas and Fe2+ ions. Suppose that 5.3 g of iron are to be dissolved in 1.7 M HCl. What is the minimum volume (in mL) of the acid solution required to react with all of the iron
What Volume of .0200 M KMNO4 is required to titrate a solution containing
What monomers make up the zylon polymer, and how is the monomer made in industrial quantities? Are alternative monomers ever used
determine the freezing point of this solution If 18.0 grams of a nonelectrolyte that has molar mass = 44.2 g/mol are combined with 110.0 grams of the solvent,?
A buffer is prepared by mixing 500 mL of 1.50 M Ch3COOH with 250 mL of 1.00 M CH3COONa. What is the pH of the buffer system after the formation of 0.15 moles of OH- from a secondary reaction with the buffer. (Ka for acetic acid = 1.7 x 10^-5)
A 1.502 gram sample of a compound of aluminum and sulfur is known to contain exactly 0.540 grams of aluminum. Determine the empirical formula for the substance.
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