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A solution is prepared from 2.50 g of an unknown compound and 25.0 g of benzene, C6H6. The freezing point of this solution is 4.3 degree celsius. Calculate the molar mass of the compound if given that normal freezing point of C6H6 = 5.5 oC , the freezing point depression constant for C6H6 = -5.12 oC/m .
Determine the number of bonding electrons and the number of nonbonding electrons in the structure of BeF_2 please Enter the number of bonding electrons followed by the number of nonbonding electrons
Consider the autodissociation of water as the behavior of an Arrhenius acid. Use this to explain the temperature dependence of the autoionization of water
Provide an example of the following mechanism by choosing an appropriate reactant and reagent then drawing curly arrows to show how the mechanism proceeds.
If the H+ ion concentration in an aqueous solution at 25.0 °C is measured as 6.6 x 10-4 M, then the pH is 1) 3.00 2) 3.18 3) 6.60 4) 9.55 5) 10.82
Given mass of a gas 0.26g, pressure is 763mmHg and volume of 147mL.by using an ideal gas law calculate the molar mass of the gas
Calculate the pH of the 0.20 M NH/0.26 M NHCl buffer. What is the pH after the addition of 20.0 mL of 0.050 M NaOH to 90.0 mL of the buffer solution? The Kb of ammonia is 1.8 x 10-5.
Calculate the molar mass of a nonelectrolyte that lowers the freezing point of 25.00 g of water to -3.9 degrees Celsius when 4.27 g of the substance is dissolved in the water.
Protein Quantification How did you determine whether your spectrophotometer was accurate(see hint above) and if it was not,what is the error?
If a buffer is prepared using equal amounts of acetic acid and sodium acetate predict what the pH of the solution will be.
What is the total pressure in a 11.0 L flask 20.0°C, which contains 0.127 moles of H2 and 0.288 moles of N2
Now consider a Rigid Rotator-Harmonic oscillator model for the HD molecule at temperature T=3 K. a) Where is each nuclei located relative to the center of mass in nm?
Why are the melting points of sodium halides very high and the melting points of silicon halides very low. Response should include descriptions of the bonding and refernce to the attractive forces that must be overcome in the two types of compound..
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