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Problem- Sketch the 19F NMR and 119Sn (only for SnF4) spectra for the following species in solution: [SF5]- C/F3 SnF4 Nuclear spins (and abundances): 19F I=1/2 (100%); 119Sn I=1/2 (8.6%). All other nuclei are NMR inactive.
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A 0.150 M solution of an enantiomerically pure chiral compound D has an observed rotation of 0.12° in a 1-dm sample container. The molar mass of the compound is 135.0 g/mol. (a)What is specific rotation of D
A solution that contains 55.0 g of ascorbic acid (Vitamin C) in 250. g of water freezes at -2.34°C. Calculate the molar mass (in units of g/mol) of the solute. Kf of water is 1.86°C/m.
What quality of heat is required to change the temperature of 30.0g of water at 10Cto 25C
A solution containing 82.0 g of ascorbic acid dissolved in 230 g of water has a density of 1.22 g/mL. Calculate the molarity of ascorbic acid in the solution.
One mole of a hydrocarbon whose formula is CnHm is burned in Oxygen at 298K and 1atm pressure. Show that the enthalpy change for this process is given by the equation
Measurements also show that a certain sample of the unknown compound contains 9.8 mol of oxygen and 3.31 mol of chromium.
Determine the molar mass of each of the following gases: a.) 0.82g of a gas that occupies 470mL at 0C and 1.00 atm (STP). b.) 1.48g of a gas that occupies 1.45L at 0C and 760 mmHg (STP). c.) 1.48g of a gas that occupies 1.30L at 695 mmHg and 20.0C..
Using library resources determine if it is possible to construct a single cell battery that has a cell potential of at least 9 V. You must use realistic concentrations for full credit.
10.1 g cao is dropped into a styrofoam coffee cup containing 157 g h2o at 18.0degc. if the following reaction occurs
Tell wheter each of the experimental errors in Exercise 3 will affect the melting point of the unknown component. If it will, tell how it will affect the melting point and explain why
How much heat is required to vaporize 18.5g of water at 100c. The heat of vaporization of water at 100c is 40.7kj/mole.
what volume of rmo2 gas in rm l measured at 795 rm mmhg and 33circ rm c is required to completely react with 54.0 rm g
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