Cov txheej txheem:
Video: Puas yog Formula hnyav tib yam li molar mass?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov formula loj ( formula hnyav ) ntawm amolecule yog qhov sum ntawm atomic hnyav ntawm cov atoms nyob rau hauv nws empirical qauv . Cov molecular loj ( molecular hnyav ) ntawm ib qho molecule yog nws qhov nruab nrab pawg raws li xam los ntawm kev ntxiv ua ke lub atomic hnyav ntawm theatoms hauv molecular formula.
Ib yam li ib tug yuav nug, qhov kev sib raug zoo ntawm cov mis hnyav thiab molar loj yog dab tsi?
Ntawd yog, lub molar loj ntawm ib yam khoom yog qhov pawg (hauv grams ib mole) ntawm 6.022 × 10 23atoms, molecules, los yog qauv units ntawm cov khoom ntawd. Hauv ib kis, tus lej ntawm grams hauv 1 mol yog tib yam li tus lej ntawm atomic pawg units uas piav txog lub atomic pawg , cov molecular loj , lub formula loj , raws.
Tsis tas li ntawd, qhov txawv ntawm qhov hnyav molecular thiab pes tsawg qhov hnyav? Qhov tseeb tsis muaj Qhov sib txawv ntawm molecular hnyav thiab qhov hnyav . Ib yam li ntawd, hnyav ntawm molecule / atom tuaj yeem qhia hauv atomic pawg unit (amu los yog u) los yog tseeb / pes tsawg pawg (i.e pawg qhia kg). Yog hais tias peb nthuav cov loj ntawm ib molecule hauv amuthen peb hu nws molecular loj / hnyav.
Ntxiv mus, dab tsi yog cov qauv ntawm molar mass?
Cov molar loj yog cov pawg ntawm ib tug muab tshuaj los yog tshuaj compound (g) muab faib los ntawm tus nqi ntawm cov tshuaj (mol). Cov molar loj ntawm ib qho compound tuaj yeem xam los ntawm kev ntxiv tus qauv atomic pawg (hauv g / mol) ntawm cov khoom siv atoms.
Yuav ua li cas hloov molar mass rau Grams?
Nws muaj peb kauj ruam los hloov moles ntawm cov khoom tograms:
- Txiav txim seb muaj pes tsawg moles raug muab rau hauv qhov teeb meem.
- Xam cov molar mass ntawm cov khoom.
- Muab cov kauj ruam ib los ntawm kauj ruam ob.
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