Video: Qhov txheeb ze feem pua yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Isotopes muaj ntau atomic masses. Cov txheeb ze ntawm ib qho isotope yog qhov feem pua ntawm atoms nrog ib tug tshwj xeeb atomic loj pom nyob rau hauv ib tug lawm tshwm sim qauv ntawm anelement.
Ib yam li ntawd, koj yuav suav li cas feem pua txheeb ze?
Teeb Kev nplua nuj Sib npaug rau x Cia x sib npaug feem pua abundance ntawm ib qho ntawm ob isotopes. Lwm qhov isotope yuav tsum muaj kev nplua nuj ntawm 100 feem pua nqe x feem pua , uas koj qhia nyob rau hauv daim ntawv decimal li (1 - x). Rau nitrogen, koj tuaj yeem muab x sib npaug rau kev nplua nuj ntawm N14 thiab (1 - x) as the kev nplua nuj ntawm N15.
Ib yam li ntawd, dab tsi yog qhov txheeb ze ntau hauv chemistry? Cov ' txheeb ze abundance ' ntawm ib qho isotope txhais tau hais tias feem pua ntawm cov isotope tshwj xeeb uas tshwm sim hauv qhov xwm txheej. Cov ntsiab lus feem ntau yog tsim los ntawm kev sib xyaw ntawm isotopes. Cov lej ntawm cov feem pua ntawm cov isotopes tshwj xeeb yuav tsum ntxiv txog 100%. Cov kwv tij atomic mass yog qhov hnyav nruab nrab ntawm cov isotopicmasses.
Ntxiv mus, puas txheeb ze abundance zoo ib yam li feem pua abundance?
Qhov txawv ntawm txheeb ze abundance thiab feem pua abundance yog tias txheeb ze abundance hais txog tus naj npawb ntawm cov khoom qab zib koj siv hauv qhov kev sim, qhov twg raws li qhov Feem pua kev nplua nuj yog xa mus rau ntau npaum li cas ntawm cov khoom qab zib muaj nyob rau hauv txhua puas candies.
Dab tsi yog feem pua natural abundance?
Hauv physics, ntuj abundance (NA) hais txog lub kev nplua nuj ntawm isotopes ntawm cov tshuaj lom neeg xws li ib txwm pom ntawm lub ntiaj teb. Tus txheeb ze atomic mass (aweighted nruab nrab, hnyav los ntawm mole-fraction kev nplua nuj cov duab) ntawm cov isotopes no yog qhov hnyav atomic teev rau lub ntsiab lus hauv lub sijhawm.
Pom zoo:
Qhov feem ntawm 33 1 3 feem pua yog dab tsi?
Piv txwv tus nqi feem pua ntawm cov zauv feem 25% 0.25 1/4 331/3% 0.333 1/3 50% 0.5 1/2 75% 0.75 3/4
Qhov feem pua ntawm qhov loj ntawm BR hauv CuBr2 yog dab tsi?
Cov feem pua ntawm cov ntsiab lus Element Symbol Mass Percent Copper Cu 28.451% Bromine Br 71.549%
Dab tsi yog qhov feem pua enantiomeric tshaj ntawm qhov sib tov uas muaj 86?
Enantiomeric tshaj (ee): Qhov ntau tshaj ntawm ib qho enantiomer tshaj qhov sib tov ntawm enantiomers. Qhia lej: enantiomeric tshaj = % ntawm cov enantiomer loj - % ntawm cov me me enantiomer. Piv txwv li: Ib qho kev sib xyaw ua ke ntawm 86% R enantiomer thiab 14% S enantiomer muaj 86% - 14% = 72% ee
Dab tsi yog qhov sib txawv ntawm qhov txheeb ze zaus thiab qhov xwm txheej txheeb ze?
Marginal txheeb ze zaus yog qhov piv ntawm cov lej ntawm qhov sib koom ua ke txheeb ze zaus hauv kab lossis kab thiab tag nrho cov ntaub ntawv muaj nuj nqis. Conditional txheeb ze zaus tus lej yog qhov sib piv ntawm qhov sib koom sib txheeb zaus thiab muaj feem cuam tshuam txog qhov sib txawv ntawm qhov sib txawv
Qhov feem pua nruab nrab qhov sib txawv yog dab tsi?
Percent Deviation Los ntawm Paub Txog Tus Txheej Txheem Feem Cuam Tshuam kuj tuaj yeem xa mus rau ntau npaum li cas cov ntsiab lus ntawm cov ntaub ntawv sib txawv ntawm qhov paub lossis theoretical tus nqi. Txhawm rau pom qhov kev sib txawv ntawm qhov feem pua ntawm no, rho tawm tus nqi paub los ntawm qhov txhais tau tias, faib cov txiaj ntsig los ntawm tus nqi paub thiab muab faib los ntawm 100