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The two following compounds are called crown ethers and they are used to protect alkali metal ions in some reactions. The oxygen atoms in each are joined -(CH2)2- or -(CH2)3- groups.
Suggest which would best protect Li+ as well as which K+cations giving your reasoning.
What feature of the oxygen atoms make them able to stabilized the cations?
What mass of carbon dioxide is produced from the complete combustion of 1.80×10?3 of methane? Express your answer with the appropriate units.
What is proton pump, proton matrix, proton gradient, and proton motive force? Please give simplies answer as possible.
The density of liquid oxygen at its boiling point is 1.14kg/L , and its heat of vaporization is 213kJ/kg. How much energy in joules would be absorbed by 4.0 L of liquid oxygen as it vaporized.
Calculate the H+ ion concentration in a 8.8 × 10-4 M Ca(OH)2 solution. A) 8.8 × 10-4 M D) 1.1 × 10-11 M B) 1.8 × 10-3 M E) 5.7 × 10-12 M C) 2.2 × 10-11 M
Recommend an explanation why the cyclic intermediate might have two important groups in a trans relationship that could factor the E-alkene.
When 10cm3 of a gaseous hydrocarbon CaHb was exploded with an excess of oxygen, a contraction of 35cm3 occured (all volumes are measured at rtp). On treatment of the product with NaOH solution, a contraction of 40cm3 occured. Deduce the formula of..
Why does it take significantly stronger magnetic and electric field strengths to move the beam of alpha particles compared with the beam of electrons (beta particles)
62 mL of 1.7M solution is diluted to a volume of 208mL. A 104mL portion of that solution is diluted using 141mL of water. What is the final concentration
What is the volume of 455 mL of oxygen gas at 67.0°C and 300. mm Hg if the conditions are adjusted to 890. mm Hg and 107°C? Assume the amount of gas is held constant.
Estimate the density of Rb if it crystallizes in a body-centered cubic unit cell and has an atomic radius of 247.5 pm.
What is the easiet way to understand chemical equations. And what exactly is the Octet Rule and how does it apply to these equations
What volume of hydrogen gas can be produced by reacting 3.86 g of aluminum in excess of hydrochloric acid at 21 degrees Celsius and 102 kPa? The reaction is:
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