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how would i complete 36-38

Chemistry
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Apr 28th, 2015

 36)   M1V1= M2V2

0.250 x 225 = 5 x V(H2SO4)

V(H2So4) = 11.25

 volume of water = 225-11.25 = 213.75 mL 

37 )atomic weight of C12H22O11 = 342

 mole of sucrose = 54.23/342=0.158 mol

 Molality = moles of solute/ volume of solvent(kg) = 0.158/0.225= 0.70 m 

38) mole of NaCl = 12.7/58.5=0 .22

mole of H2O = 87.3/18 = 4.85

mole fraction of Nacl = mole of Nacl/ total mole = 0.22/ (4.85+0.22)

                                                                             = 0.043 


Apr 28th, 2015

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