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Three trials to determine concentration of unknown substance. Values: .210 M,.198M, .203 M . The actual concentration is .135 M.
The atomic mass of element X is 33.42 amu. A 15.05-g sample of X combines with 79.32 g of another element Y to form a compound XY. Calculate the atomic mass of Y.
use the appropriate relationships from the chapter of electrons in Atoms to determine the wavelength of the line in the emission spectrum of He+ produced by an electron transition from n=5 to n=2
For the following molecules and ions, draw a Lewis structure, calculate formal charges for each atom, and determine the oxidation number for each atom.
how many liters of nog are produced when 0.85l of 2.00m hno3 solution is added to 216 of ag according to the equation.
The atmospheric pressure 4.The volume for the vapor to occupy above the liquid 5.The temperature of the liquid
If you have 400mL of .5 M NH3, how many moles of .47 M HCl must be added to the ammonia solution to reach the equivalence point.
what volume of a 0.37 M Mg(NO3)2 solution contains 87g of Mg(NO3)2.
compute the thermal-equilibrium values of hole and electron concentrations while considering a homogeneous gallium
The pH of rainwater in a polluted area was found to be 3.50. What is the H+ concentration
the most common source of copper is the mineral chalcopyrite. how many kilograms of chalcopyrite must be mined to
Diphosphorus pentoxide is added to water Hydrogen sulfide gas is bubbled through a solution of silver nitrate
for a hydrogen atom calculate the energy of a photon in the balmer series that results from the transition n 3 to n
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