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If you have 375 molecules in a 10^-4dilution, how many molecules were in the original solution?
According to the solubility rule, silver will precipitate with SO42- but doing my lab i found no precipitation when i added AgNO3
In the titration of 68.0 mL of 1.0 M methylamine, CH3NH2 (Kb = 4.4 10-4), with 0.49 M HCl, calculate the pH under the following conditions.
Calculate pFe2 at each of the following points in the titration of 25.00 mL of 0.02075 M Fe2 by 0.03616 M EDTA at a 6.00 pH:11.50 mL,
How many valence electrons does one molecule of aspartame have? What are the bond angle measurements of aspartame?
To convert from the volume by percent of a gas to the mole fraction of a gas (i.e. problem 35 from chapter 9), why is it that all you have to do is divide the volume percent by 100%
What mass of isopropyl alcohol (C3H8O) in grams can be melted when a sample absorbs 1575 kJ of heat at its melting point? (Isopropyl alcohol: ?Hfus = 5.37 kJ/mol)
A metal, M, can readily form the M+ cation. A nonmetal, X, is a gas at room temperature and can easily form the X- anion. Is the product of the reaction of M and X a molecule or an ionic compound?
can a liquid be identified by the same principl(e.g. mixing an unknown liquid with known liquid) and determining if the boiling point of the mixture is depessed if the two liquids are different?
Using the equation E0cell = E0cathode - E0anode, and the reference value of E0 for Cu(II)/Cu(s) for the role that copper plays in this overall cell reaction, determine the value of the standard potential for the half-reaction Zn2+(aq) + 2e- -> Zn(..
Methyl alcohol (CH3OH) has a density of 0.793 kg/L. What volume of it is needed to add to water to make 5 liters of 0.250 M solution?
Using 3.2 g bromobenzene. Calculate the number of grams of Mg required if you need a molar equivalency of 1.25. Then calculate the amount of benzaldehyde (106.12 g/mol), benzophenone (182.22 g/mol), and methyl benzoate (136.15 g/mol) needed (they ..
Using the Henderson Hasselbalch equation, calculate the amount of monosodium phosphate (NaH2PO4, MW=120.01 g/mol) and disodium phosphate (Na2HPO4, MW=141.96 g/mol) required to prepare 100.mL of a 200. mM phosphate bugger of pH 6.5
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