Find molar ratio of sodium borohydride to fluorenone
Determine the molar ratio of sodium borohydride to 9-fluorenone that you used in the experiment. Why is it necessary to use a greater molar ratio than theoretical?
.102 g of 9-fluorenone.025 g of sodium borohydride
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What is the theoretical yield for the equation FeCl3+3NaOH=Fe(OH)3+3NaCl
The atomic weight of a newly discovered el- ement is 98.225 amu. It has two naturally occuring isotopes. One isotope has a mass of 96.780 amu. The second isotope has a per- cent abundance of 41.7%. What is the mass of the second isotope?
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Calculate the mass of propylene glycol ({rm{C}}_3 {rm{H}}_8 {rm{O}}_2 ) that must be added to 0.340 kg of water to reduce the vapor pressure by 2.86 torr at 40 ^circ ,{rm C} (P_{{rm H}_2{rm O}} at 40 ^circ,{rm C} = 55.3;{rm torr}).
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In the other determination, the sample height is 4-5 mm and themelting range is found to 141-145C. Explain the broader meltingpoint range observed for the second sample. The reported melting point for the compound is 143C.
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