Cov molar loj ntawm txhua lub ntsiab lus tuaj yeem yog txiav txim siab los ntawm kev nrhiav cov atomic loj ntawm lub caij nyob rau hauv lub sijhawm. Piv txwv li, yog atomic mass ntawm sulfer (S) yog 32.066 amu, ces nws molar mass yog 32.066 g / mol.
Koj pom molar loj npaum li cas muab moles thiab grams?
Ua piv txwv: molar mass=mass ÷ moles (M=m/n)
- Extract cov ntaub ntawv los ntawm lo lus nug: mass=m=29.79 g. moles=n=1.75 mol.
- Kuaj cov ntaub ntawv kom sib xws: …
- Sau qhov sib npaug: molar mass=mass ÷ moles. …
- Hloov cov txiaj ntsig rau hauv qhov sib npaug thiab daws cov molar mass: molar mass=M=29.79 ÷ 1.75=17.02 g mol-1
Koj pom molar loj npaum li cas ntawm grams?
Molar mass yog qhov hnyav (hauv grams) ntawm ib lub mole ntawm ib yam khoom. Siv cov atomic loj ntawm ib lub caij thiab muab nws los ntawm kev hloov pauv yam grams ib mole (g / mol), koj tuaj yeem xam cov molar loj ntawm lub caij.
Yuav ua li cas yog molar mass ntawm ib yam khoom?
Cov molar mass ntawm ib yam khoom yog qhov hnyav hauv grams ntawm 1 mole ntawm cov khoom. Raws li tau pom hauv daim vis dis aus no, peb tuaj yeem tau txais cov tshuaj molar mass los ntawm kev suav cov molar pawg ntawm nws cov khoom siv atoms. Tom qab ntawd peb tuaj yeem siv qhov ntsuas molar loj los hloov pauv ntawm huab hwm coj thiab tus lej ntawm moles ntawm cov khoom.
Yuav ua li cas koj pom cov molar loj ntawm hoob 11?
Kev daws: Cov molar mass ntawm molecules ntawm cov ntsiab lus yog sib npaug raumolar mass ntawm cov atoms muab ntau npaum li cas ntawm atoms nyob rau hauv txhua molecule. Molar Mass (Cl2)=2 × 35.453(2) × 1.000000 g/mol=70.906(4) g/mol.
