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If you dissolve .95 grams of an unknown salt into 13 grams of Benzene (C6H6) and find that the new freezing point is 2.78oC, what is the Molar Mass of the unknown? Calculate what the new boiling point would be. What would the mole fraction of Benzene be?
Pressure is measured and is 28.476861 atm at 297.15 K. The vapor pressure of the water is 0.02947 atm at 297.15 K. How many grams of each product are formed and with how many grams of C7H14 did you start with
if a carboxylic acid ester is exposed to an environment such as sweaty skin acidic aqueous environment for quite a
chlorine has two stable isotopes of mass 34.97 u and 36.97 u.suppose the percent abundance of the lighter isotope were
Two 28.0 ml samples, one 0.100 M HCl also the other 0.100 M HF, were titrated with 0.200 M KOH. Explain what is the volume of added base at the equivalence point for HCl and HF
necessary parts of a neutralization reaction except
If 3.20mL of vinegar needs 41.5mL of 0.150 molarity NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.50qt sample of this vinegar?
To calculate the air pressure, the volume occupied by the air is assumed constant. Why is this assumption incorrect? Explain how the vapor pressure calculated and the resulting Clausius-Clapeyron plot are affected.
What mass of this substance must evaporate in order to freeze 112 of water initially at 18? (The heat of fusion of water is 334 the specific heat of water is 4.18 .
Calculate the enthalpy change for the thermite reaction: 2Al(s) + Fe2O3(s)=2Fe(s)+Al2O3(s) ΔHrxn= -850kJ. when 12.0 mol of undergoes the reaction with a stoichiometrically equivalent amount of Fe2O3.
An electron in the hydrogen atom makes a transition from an energy state of principal quantum number ni to the n2 state. If the photon emitted has a wavelength of 487 nm, what is the value of ni.
Place a line at the appropriate length for "300 nm" and for "250 nm". Below each of these 4 wavelengths place the equivalent wavenumber in cm-1.
Find out the amount number of mol of negative charge present in a sample of an ionic compound that contains 23.1 g of a 3- anion whose molar mass MM is 96.07 g/mol.
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