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1.) To what volume should you dilute 40.0ml of a 4.65M KI solution so that 27.0ml of the diluted solution contains 3.95g of KI ?
2.) An aqueous NaCl solution is made using 111g of NaCl diluted to a total solution volume of 1.00L .Calculate the molality of the solution. (Assume a density of 1.08g/ml for the solution.)2b.) Calculate the mass percent of the solution. (Assume a density of 1.08g/ml for the solution.)
A 250-L tank is evacuated and connected to a 50.0-L bulb filled with compressed argon. After they are joined, the pressure in the bulb falls to 2.20 atm.
Silicon tetrafluoride reacts with F- to produce the hexafluorosilicate ion, SiF6 2-. GeF4 behaves similarily, but CF4 does not. (A) Draw Lewis structures for SiF4, GeF6 2-, CF4. What is the hybridization of the central atom in each species
How many moles of O2 are needed to consume 0.52 mol of Mg in the following unbalanced reaction? Mg plus O2 -> MgO
The reaction 2NO ? N2 + O2, has a rate constant of 3.6 x 10^-2 M^-1 s^-1. When [NO]= 2.8 x 10^-3 M, what is the rate of change in M.s^-1 for N2?
The sulfur dioxide stack gas concentration from fossil fuel combustion is 2ppm(v). Determine the stack-gas concentration in units of micro grams/m^3 assume 0 degrees Celsius and1atm.
Which set of quantum numbers describes the highest energy electron found in the ground state of a Scandium atom?
particular sample of pure iron requires 0.595 kj of energy to raise its temperature from 25oc to 45oc. the specific
Calculate the new freezing point for a 0.61 m solution of CCl4 in benzene. 2) Calculate the increase in the boiling point, Î"T, for a 1.94 m solution of sucrose (dissolves as a molecule) in water
If a 180 mg piece of gold (density =19.32 g/cm^3 ) is hammered into a sheet measuring 2.3 x 1.0 ft , what is the average thickness of the sheet in meters?
You have synthesized a new compound: the crude product melts at 102-106 degrees C. You spend a little time purifying it and do the melting point again. What range would you expect the m.p. to be for the purified sample? Explain your reasoning brie..
Describe the characteristic infrared absorption frequencies that would allow you to distinguish between the following pairs of compounds.
explain the main concept behind the vsepr theory of molecular shape. how do both number and type of electron pairs
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