Qhov Tseem Ceeb Qhov txawv - Formula Unit Mass vs Molecular Mass
Formula unit mass lossis formula mass of a compound is the mass of empirical formula of that compound. Cov mis empirical ntawm ib qho compound yog cov tshuaj formula uas muab qhov sib piv ntawm cov atoms sib txawv tam sim no nyob rau hauv cov compound hauv me me, tag nrho cov lej. Hauv lwm lo lus, nws yog qhov tsawg tshaj plaws ntawm cov khoom siv tshuaj hauv ib qho chaw. Nws tsis muab tus naj npawb tiag tiag ntawm txhua yam tshuaj. Thaum ntsuas qhov loj ntawm cov qauv no, nws yog hu ua formula unit mass. Lub molecular loj ntawm ib qho compound yog qhov loj ntawm ib qho molecule ntawm ib yam khoom. Feem ntau, cov ntsiab lus molar mass thiab molecular mass yog siv sib hloov, txawm tias lawv yog cov ntsiab lus sib txawv. Molar mass yog qhov loj ntawm mole ntawm cov khoom thaum molecular mass tsis yog qhov loj ntawm mole ntawm ib yam khoom. Rau cov molecules yooj yim, formula mass thiab molecular mass yog tib yam. Tab sis rau cov tebchaw complex, muaj qhov sib txawv loj ntawm ob qhov tseem ceeb. Qhov sib txawv tseem ceeb ntawm cov mis loj thiab molecular loj yog tias tus nqi ntawm cov mis formula unit loj yog ib txwm me dua los yog zoo ib yam li cov molecular loj ntawm tib yam khoom, whereas tus nqi ntawm molecular mass yog ib txwm loj los yog zoo ib yam li cov formula unit loj ntawm tib. khoom.
Formula Unit Mass yog dab tsi?
Formula unit mass lossis formula mass yog qhov loj ntawm cov mis empirical ntawm ib yam khoom. Qhov no txhais tau tias, nws yog cov lej ntawm cov atomic masses ntawm cov tshuaj muaj nyob rau hauv cov mis empirical. Cov mis empirical yog cov tshuaj formula ntawm ib yam khoom uas muab qhov yooj yim piv ntawm cov tshuaj muaj nyob rau hauv ib yam khoom. Piv txwv li, tus qauv qhia txog C6H12O6 (glucose) yog CH. 2O. Cia peb xav txog ob peb yam piv txwv kom nkag siab txog lub tswv yim.
Calculation of Formula Unit Mass
Formula Unit Mass of Simple Compounds
Rau cov sib xyaw yooj yim xws li NaCl (sodium chloride), cov mis empirical thiab cov mis molecular yog tib yam. Tus nqi ntawm cov formula unit loj yog, (Atomic mass of Na) + (atomic mass of Cl)=(23 + 35.5) amu=58.5 amu
Formula Unit Mass ntawm Complex Compounds
Rau cov tebchaw xws li C11H22O11 (sucrose), Cov mis empirical yog CH2 Tom qab ntawd tus qauv ntsuas yog,
(Atomic mass of C) + 2(atomic mass of H) + (atomic mass of O)=(12 + {2 × 1} + 16) amu=30 amu.
Rau cov khoom sib xyaw polymer, formula unit mass yog qhov loj ntawm chav tsev rov ua dua. Ib qho polymer yog ib qho macromolecule uas yog tsim los ntawm ntau tus lej ntawm cov sib txuas me me hu ua monomers. Ib chav tsev rov ua dua sawv cev rau cov monomer lossis monomers siv los tsim cov polymer compound. Li no, nws yog sib npaug rau cov qauv empirical ntawm lub complex compound.
Molecular Mass yog dab tsi?
Molecular mass yog qhov loj ntawm ib qho molecule ntawm ib yam khoom. Nws tseem hu ua qhov hnyav molecular. Qhov hnyav molecular yog xam raws li qhov sib npaug ntawm cov atomic loj ntawm tag nrho cov tshuaj muaj nyob rau hauv cov molecule txiav txim siab qhov sib piv ntawm cov ntsiab lus.
Yog li ntawd, rau cov tebchaw loj, cov khoom sib xyaw ua ke, tus nqi ntawm cov mis chav tsev loj yog ib txwm loj dua li ntawm cov molecular mass. Tab sis rau me me, yooj yim molecules, ob qho tib si tuaj yeem yog tib yam.
Calculation of Molecular Mass
Cia peb xav txog qee qhov piv txwv kom nkag siab txog txoj kev suav.
Example: Glucose
Cov tshuaj formula ntawm qabzib yog C6H12O6. Yog li qhov hnyav molecular ntawm qabzib yog,
6(Atomic mass of C) + 12(atomic mass of H) + 6(atomic mass of O)
=6(12am) + 12(1am) + 6(16am)
=(72 + 12 + 96) amu
=180 amu.
Daim duab 01: Glucose Molecule
Piv txwv: Calcium Carbonate
Cov tshuaj formula ntawm calcium carbonate yog CaCO 3, uas kuj yog cov qauv qhia pom ntawm qhov sib xyaw. Yog li, qhov hnyav molecular ntawm calcium carbonate yog,
(Atomic mass of Ca) + (atomic mass of C) + 3(atomic mass of O)
=(40 + 12 + {3 x 16}) amu
=100 amu
Dab tsi zoo sib xws ntawm Formula Unit Mass thiab Molecular Mass?
- Ob qho Formula Unit Mass thiab Molecular Mass yog qhov hnyav ntawm cov tshuaj.
- Ob qho Formula Unit Mass thiab Molecular Mass muaj tib chav ntsuas.
Qhov txawv ntawm Formula Unit Mass thiab Molecular Mass yog dab tsi?
Formula Unit Mass vs Molecular Mass |
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| Formula unit mass lossis formula mass yog qhov loj ntawm cov qauv ntawm cov khoom siv tshwj xeeb. | Molecular mass yog qhov loj ntawm ib lub molecule hauv ib yam khoom. |
| nqi | |
| Tus nqi ntawm cov mis loj yog ib txwm me dua lossis zoo ib yam li cov molecular loj ntawm tib yam khoom. | Tus nqi ntawm molecular mass yog ib txwm loj dua los yog zoo ib yam li cov formula unit loj ntawm tib yam khoom. |
Summary – Formula Unit Mass vs Molecular Mass
Formula unit mass yog qhov loj ntawm cov qauv ntawm cov khoom siv tshwj xeeb. Qhov loj ntawm molecular ntawm ib yam khoom yog qhov loj ntawm ib qho molecule ntawm ib yam khoom. Qhov txawv ntawm formula unit mass thiab molecular mass yog hais tias tus nqi ntawm formula unit loj yog ib txwm me me los yog zoo ib yam li cov molecular mass ntawm tib yam khoom, whereas tus nqi ntawm molecular mass yog ib txwm loj los yog zoo ib yam li cov formula unit loj ntawm tib yam khoom..
