Various Chem Problems: a) The average atomic mass of nitrogen is 14.0067. The at

Question

Various Chem Problems: a) The average atomic mass of nitrogen is 14.0067. The atomicmasses of the 2 stable isotopes of nitrogen, 14N and15N, are 14.003074002 and 15.00010897 amu, respectively.Use this info to determine the % abundance of each nitrogenisotope. b) Which of the following compounds are likely to be ionic?which are likely to be molecular? SiCl4, LiF,BaCl2, B2H6, KCl,C2H4, CH4, NaBr, BaF2,CCl4, ICl, CsCl, NF3. Various Chem Problems: a) The average atomic mass of nitrogen is 14.0067. The atomicmasses of the 2 stable isotopes of nitrogen, 14N and15N, are 14.003074002 and 15.00010897 amu, respectively.Use this info to determine the % abundance of each nitrogenisotope. b) Which of the following compounds are likely to be ionic?which are likely to be molecular? SiCl4, LiF,BaCl2, B2H6, KCl,C2H4, CH4, NaBr, BaF2,CCl4, ICl, CsCl, NF3.

Explanation / Answer

    a)   Average atomic mass ofnitrogen = 14.0067 amu           letthe fraction of abundance of  14N be x                  percent abundance of   15N= 1-x                  14.0067 amu = x ( 14.003074002 amu)+ (1-x) * 15.00010897 amu               by solving   x = 0.9963                      percent abundance of 14N = 0.9963 *100                                                                     = 99.63%                   percent abundance of   15N = 100 - 99.63 = 0.37%                         b)    Ionic compounds : BaCl2 , KCl , BaF2, CsCl , NF3  , LiF , NaBr                molecularcompouds : SiCl4 , NF3, B2H6 , C2H4 ,CH4 , CCl4 , ICl ,          

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