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what concentration of aqueous NaCl solution freezes at -15.2 C? the freezing point of pure water is 0.0 C and Kf of pure water is -1.86 C/m.
what amount of energy is required to completely ionize 6.2 grams of carbon atoms in the gas phase cg if the ionization
What is a zymogen? Is it used over and over like other enzymes? And what is the physiological advantage
which has the most mass. which has the least. which has the most number of atoms. which has the least. which has highest density. which has the least. Do the most atoms always correspond to most mass.
A piece of metal that has a density of 5.2 g/cm3 and a mass of 100 g was placed in a full jar of water. How many mL of water spilled out of the jar?
10.00 ml of 0.100M HCL were used to titrate .300g of the sample using phenolphthalein as an indicator. Calculate the number of moles and the mass of sodium carbonate present in the mixture.
The molecular shape of [TeF3 ]-1 is: A. tetrahedral B. square planar C. square pyramidal D. trigonal bipyramidal E.octahedral F. T-shaped G. see-saw, butterfly, or unsymmetrical tetrahedron
What is the concentration of the potassium ion (in M) in a solution which contains 50.4 g potassium phosphate in 610 mL of solution
Calculate the values of Avogadro's number and the Faraday assuming the charge in an electron is 1.602 x 10^-19 coulombs/electron. Also calculate the mass the magnesium anode have lost during the process.
Determine the percent yield for the reaction between 45.9g of NaBr and excess chlorine gas to produce 12.8g of NaCl and an unknown quantity of bromine gas.
A sample of a dish from an archaeological dig gave 18 500 disintegrations per gram of carbon per day. A 1.00-g sample of carbon from a modern source gave 22 080 disintegrations per day.
.35 M NaOH solution to reach the equivalence point. Determine the molar mass of the acid and given nthat the pH at the half way point to the equivalent point is 3.86. Calculate the Ka of the unknow acid.
Write a mechanism for the acid-catalyzed transesterification reaction of ethyl acetate with 1-butanol, which gives butyl acetate.
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